Finding & Testing SIMPLE Solutions for COMPLEX Problems
CASE STUDY 1
“
Helping achieve
One-Simple-ABB ” with “ TOC in SAP” within Complex Manufacturing Environment
THEORY OF CONSTRAINTS
CASE STUDY 2
Finding & Testing a solution to
SHORTAGES & SURPLUSES within Book Publishing Supply Chain
Presenter: Dr Alan Barnard, CEO Goldratt Research Labs
Date: 27 th August
© 2004 TOCICO. All rights reserved.
1
THEORY OF CONSTRAINTS
Helping Achieve “ with
One-Simple-ABB ”
TOC in SAP
Presenter: Dr Alan Barnard, CEO Goldratt Research Labs
Contributors : Dr Katja Rajaniemi, Improvement Manager ABB BU
Fredrik Nordstrom, Regional Manager ABB Ops Development Group
Lukasz Krupa, Leader, ABB Manufacturing IS Solutions
Alex D’ ’Anci, Regional Manager, ABB Ops Development Group
Eli Schragenheim, Goldratt Schools
© 2004 TOCICO. All rights reserved.
2
TOC Research Projects
• Research Background
• ABB Case Study:
− Facts about ABB
− ABB’s Continuous Improvement Evolution at ROI
− The “One-Simple-ABB” Challenge for Operations Excellence
− Conflict in leveraging and standardizing on best practices across ABB
−
Conflict in leveraging and standardizing on a single IT Platform and
ERP system
− Finding a Solution to the “One-simple-ABB” Challenge
−
Defining a simple yet robust TOC solution for 300+ different factories
− Defining “TOC in SAP” using Goldratt’s “Strategy and Tactic” (S&T) process
− Testing “TOC in SAP” solution through series of Pilots
− Results achieved to date & next steps
• Research Conclusions
3
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
RESEARCH PROBLEM
− Most companies today, have left the final choice of which which Planning, Execution and Continuous improvement
(PECI) methods and which IT systems to support these to
Business Units because BUs are:
− Responsible for continuously improving on their result.
− In the best position to decide which methods & systems best meet their specific requirements.
− Normally responsible for pay for these.
− No wonder BU’s have resisted most attempts to standardize or centralize IT and PECI’s …
4
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
RESEARCH PROBLEM
− However, not standardizing and leveraging Best Practices and a common IT platform, has major negatives for the
Company as a whole…
− Providing Support to multiple IT platforms and different
Improvement methods is a nightmare for Centralized functions and very costly
− Ensuring fast and reliable integration of data between different systems is a major challenge and occupies valuable management time every month
− Business Processes cannot be standardized to enable fast and accurate transactions.
− Best Practices are not shared and results achieved are not duplicated
5
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
RESEARCH QUESTIONS
Q1: Is it possible to find a " one-solution-fits-all " both in rules and ERP technology when it comes to planning, execution and improvement of operations especially considering the many specific local considerations resulting in " we are different ”)?
Q2. Even if it was possible to theoretically find such a solution that could meet most business requirements, would it be possible to get buy-in from regional and plant managers under pressure to improve performance & reduce costs to test such a solution?
6
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
RESEARCH METHOD
1.
Literature Review to identify which companies have tried and succeeded and which not and Why?
2.
Consultation with Experts to determine if a “One-
Solution-fitsall” solution design was possible and then whether such a solution can be implemented within a standard ERP System (the hypothesis to be tested)
3.
Followed Action Research method using “Plan, Do,
Review & Act ” cycles to validate and continuously improve hypothesis
7
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
Power
Products
Power Systems
Automation
Products
Process
Automation
Robotics
ABB is the world’s leading provider of power and automation technologies with strong market positions in core businesses
ABB’s goal is to create value for their stakeholders by helping customers Use
Electrical Power more Efficiently, Increase Industrial Productivity, Lower
Environmental impact in a sustainable way
Revenues in 2007 : $29.2 billion and Orders for $34.3 b (large backlog)
Headquarters: Zurich, Switzerland
About 107,000 employees in 100 countries with Market-leading positions in most key products
Robust global value chain to serve established and emerging markets
300+ factories around the world
8
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
Competitors
4 Competitors also have aggressive operational excellence programs
Sub Sub Suppliers Customers
3 Supply Partners expect
Better visibility (and prices) for Improved reliability and response
P
2
Shareholders expect
Increase EBIT (growth)
Reduce COPQ (stability)
1 Customers expect more for less faster each year
T
Revenues COPQ
EBIT
9
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
1992 Production
Technology
Organization part of Corp. R&D in
Finland
1993 first DBR implementation
1998 Corp R&D
Program for
Manufacturing
Technologies
2001
Eli Goldratt
1999 visits
12 Jonahs trained
ABB
2002
ConWIP
2007
OEP for IS
By 2008 ~100
Trained in “Advanced TOC”
~500 in TOC through OEP 2007
TOC in
SAP
2005
Test TOC
Distribution
Solution
2008
OEP for
Controllers
2006
MT R&D Program becomes
Operations Development Group.
50 consultants in 4 centers
2003
Operational
Excellence Program (OEP) launched as CP3
1988
TOC + Lean Thinking + OEP = Operational Excellence
10
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
2010
TOC Research Projects
1) Source: Copenhagen Institute for Futures Studies and Larry Keeley: www.doblin.com
(3000 projects examined)
11
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Sample TOC & Lean success stories in ABB
(1/2)
TOC Research Projects
Distribution Transformers production unit
2005 TPT (Line1)
TPT (Line2)
- 75%
- 65%
Distribution Transformers production unit
LV Motors manufacturing unit
Tap Changer manufacturing unit
2005
2005
2005
TPT
Delivery time
> - 50%
> - 25%
Total inventory reduction 1,2 MUSD while 40% volume increase
Productivity
TPT
+38%
-17%
TPT
Delivery time
- 50%
> - 60%
HV Bushings manufacturing unit 2005 Capacity
TPT
OTD
2005 Value chain from a component factory in Europe to a product factory in Asia
+30%
- 50% from 8 to 93%
Replenishment time - 72%
Total inventory turns +200%
On Time Delivery from 83 to 95-100%
Technology Development Centre 2005 Project OTD from 45 to 87% with significantly reduced cycle time
Functional Completion Rate incr. to 100%
Cables manufacturing unit 2004 TPT
WIP
- 80%
- 60%
Distribution Transformers production unit
HV Switchgear
2004 TPT
Delivery time
OTD
- 70%
- 48% from 70 to 96% while 245% increase in orders received
2004
12
Capacity
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
+43%
Sample TOC & Lean success stories in ABB
(2/2)
TOC Research Projects
Power Transformers production unit
Distribution Transformers production unit
2007
2007
WIP and LT - 40%
OTD (On Time Delivery) from 86 to 100%
Capacity +100% without planned expansion
WIP
TPT
OTD
- 45%
- 70% from 45% to 98%
Distribution protection and control 2007 products manufacturing unit
MCB production unit
Power Transformers production unit
Distribution Transformers production unit
MV Circuit Breakers manufacturing unit
LV Breakers and Switches production unit
2007
2006
Delivery time
OTD
Capacity
Delivery time
OTD
Productivity
Delivery time
WIP
2006
2006
Capacity
TPT
Delivery time
Inventories
OTD
Capacity
TPT
Delivery time
OTD
2006 Capacity
Delivery time
OTD
13
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
- 50% from 40 to 100%
+ 30 % with existing resources
- 50% for stock and non-stock items from 84% to 97%
+30%
- 50% (from 6 to 3 months)
- 35%
+30%
- 64%
- 32%
- 44% from 66 to 98%
+260%
- 60%
- 60% from 77 to 100%
+25%
- 80% from 23 to 90%
What is the benefit of using TOC as a focusing tool for LEAN & Six Sigma vs. using each in isolation?
TOC Research Projects
• Leading global electronics manufacturing services (EMS) company employing over 48,000 people and revenue of $11.7 Billion
• Set-up experiment over 2.5 years to test financial impact of LEAN, Six Sigma and TLS (TOC focusing LEAN & 6S)
• 21 Participating plants with:
11 Plants on Six Sigma
4 Plants on Lean
6Plants on TLS
Contribution % to realized savings by method applied
TLS
89%
Lean
4%
Six Sigma
7%
Per Project Financial Return
• TLS, Lean, and Six Sigma all offered benefits
• TLS showed 3.9 times greater financial benefit delivering 89% of total benefits achieved from only 6 out of 21 plants
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
Return
Lean Six Sigma
Methodology
TLS
Source: Apics Magazine, May 2006 and TOCICO 2007
14 russ.pirasteh@sanmina-sci.com
But how do you achieve Step-Change AND
Continuous Improvement within any organization?
TOC Research Projects
P D
S D
A C
= Standardize , Do, Check, Act
Continuous ( Evolutionary ) Improvement through institutionalizing Best Practices
A C
= Plan , Do, Check, Act
Step-Change ( Revolutionary ) Improvement through Constraint Focused interventions (Kaizen)
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
What blocks a company such as ABB from identifying and spreading best-practices, learnings and results effectively in a big organization?
The “Best Practice” Standardization Dilemma
Action
Objective
Need
Have a way to Roll
-out best-practices efficiently & effectively
Standardize our improvement approach
Because:
Ensure leverage of Best-Practices in all Business units
Need
Have a way to ensure outstanding result in each BU
Conflict
Action
Customize an improvement approach for each business unit
Each BU/Factories is different which mean there are no
“one-solution-fitsall” that can be rolled out
Really?
16
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
Despite the many differences between the plants where
TOC+LEAN were implemented, it seemed to deliver similar results without any significant differences in the “what” and “how to”…
Objective
Resolving the Standardization Dilemma:
Ensure leverage of Best-Practices in all units
Need Action
Roll-out best practices effectively
Standardize our improvement
Need
Use TOC to focus & synchronize
Planning, Execution & Cont.
Improvement solution ( TOC +
LEAN ) and an participative engagement approach getting contribution and approach for
Ensure outstanding result in each unit personnel each time
17
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
ABB Gate Model for Process Improvement projects of Best Practices using a holistic
TOC approach
TOC Research Projects
…. addressing resistance to change as an organizational constraint:
Analysis
0
Project
Start
Agreement
1
Project scope definition
Planning Execution Sustain
2
Project
Execution
Plan
Development
3
Piloting
4
Final solution agreement
Implementation
Pilot results
Project
Hand over
5 6
Close project
7
Validate results
1. Agreement on the problem
2. Agreement on the direction of the solution
3. Agreement that the solution will yield the desired results
4. Agreement that no disastrous side effects will result
5. Agreement on the implementation requirements and the plan itself
6. Agreement by all collaborators including management that we can move forward with confidence
But how do a standardize “Best Practices” without standardizing the IT Platform?
18
Source: ABB developed (based on Cooper
´ s Stage-gate model).
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
ABB’s ERP System reality after years of acquisitions and empowered BU and
Regional IT decision making..
TOC Research Projects
• As a result of numerous acquisitions, ABB at one time had more than 500 ERP systems and 70 different ERP brands in operation across its businesses.
• Most of the factories and distribution centres were also using inhouse developed Spreadsheets and Databases for supporting their preferred Planning, Execution and Continuous Improvement
Methods
• Integration of systems and data (and support) had become a nightmare and major risk to the business.
• In late 2006, a decision was made at the ABB board , to embark on a
(challenging) journey of standardization on a common IT / ERP
Platform (or at least range of platforms) and simplification based on
“best-practices” .
• The initiative was titled “ One-simple-ABB ” or “OsA”.
19
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
Press Release in March 2007
“Today, ABB signed a strategic agreement with the German-based ERP provider, SAP to help deploy common SAP ERP software through its global operations to help unify and simplify some of ABB’s most important business processes. The OsA initial target is one ERP per country , and ultimately one ERP platform per region for all of ABB that would enable a high degree of standardization in the human resources, finance and administration and corporate governance functions as well as in the operational excellence “best-practices ”
Yes,
BUT....
Would it really be possible to find and get agreement that a
“One-simple-ABB” solution was possible for managing the diversity and complexity of ABB’s 300+ factories ?
20
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
The Operations dilemma in supporting ABB’s global “One-Simple-ABB” objective?
TOC Research Projects
The “One-Simple-ABB” Dilemma
Objective
Create long term competitive edge in our industry
Need
Efficient and fully integrated Finance,
HR & OPS business processes across
ABB
Need
Continuously
Improve customer service and sales through efficient & effective operations
Action
Deploy a common
ERP platform across
ABB and limit selection of SCM &
MES systems
Action
Allow each site to develop own / use
3 rd party ERP, SCM
& MES systems
Because:
Each BU/Factory is unique and using a common ERP platform or limiting choices in SCM / MES methods & systems will jeopardize results and or ownership
Use
Legacy /
3 rd Party
Not updating
ERP
Don’t trust
ERP
ERP inaccurate
21
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
The Operations dilemma in supporting ABB’s global “One-Simple-ABB” objective?
TOC Research Projects
The “One-Simple-ABB” Solution for Operations
Objective
Create long term competitive edge in our industry
Need
Efficient and fully integrated Finance,
HR & OPS business processes across
ABB
Need
Continuously
Improve customer service and sales through efficient & effective operations
Direction of win-win solution:
•
Get agreement that TOC can provide “one-solution-fits-all”
• Find a way to Modify SAP R3 to support TOC (TOC Planning,
•
Execution & POOGI rules).
ABB to launch a “TOC in SAP” initiative to validate above hypothesis
Yes
Q1: Would it really be possible to define a TOC “ One-solution-fits-al l ” ?
Q2: Would it really be possible to modify SAP to support this solution ?
22
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Getting Agreement & testing TOC Solution Design &
SAP functionality
TOC Research Projects
Project Start
“TOC in SAP”
Intro W/Shop
In Zurich
TOC Solution Validation &
Pilot Selection
Web-call with
Dr. Eli Goldratt
TOC Solution Design
W/Shops
In Brno to specify the solution
W/Shop in
Krakow reviews
ABB diversity
SAP Development & Test
Collaboration of
ABB, TOC & SAP
SAP
Blueprint
Experts
Experts convert
Solution Design into Functional
Reqs
Roll-out & Validation
Cont. To validate robustness & results
“Go-Live”
At Pilot Site In
Brno
Jan
2007
March
2007
Jun
2007
Aug
2007
Oct
2007
Nov
2007
Ongoing
So, what was the process we used to find and test a
“ SIMPLE & ROBUST ” solution...
...introducing Goldratt’s Strategy & Tactic Tree
23
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Finding a simple & robust SCM solution for
ABB that is generic enough to be used by all factories
TOC Research Projects
Using Goldratt’s Strategy & Tactic
1 tree method to find a simple &
ABB Goal: robust Planning, Execution & Cont.
Improvement solution…
Profitable Growth
2.1
Reliability/Avail ability
Competitive
Edge
2.2
Rapid Response
Competitive
Edge
3.1.1
Remarkable
Due Date Perf
& Availability
3.1.2
Selling
Reliability/Availabi lity Selling as
Comp. Edge
3.1.3
Coping with Sales
Growth
3.2.1
Remarkable
Rapid
Response
3.2.2
Protective
Capacity for
RR orders
3.2.3
3.2.4
Selling Rapid
Response as
Comp. Edge
Expanding
RR Client
Base
“The best solutions start with the right questions…”
24
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Finding a simple & robust SCM solution for
ABB that is generic enough to be used by all factories
TOC Research Projects
1
ABB Goal:
Profitable Growth
2.1
Reliability/Avail ability
Competitive
Edge
2.2
Rapid Response
Competitive
Edge
3.1.1
Remarkable
Due Date Perf
& Availability
3.1.2
Selling
Reliability/Availabi lity Selling as
Comp. Edge
3.1.3
Coping with Sales
Growth
3.2.1
Remarkable
Rapid
Response
3.2.2
Protective
Capacity for
RR orders
3.2.3
3.2.4
Selling Rapid
Response as
Comp. Edge
Expanding
RR Client
Base
What really causes low
Tput, poor DDP /
Availability & Long LT?
Other “Hidden” Disruptions to Flow
Unsynchronized Priorities in Operations
Releasing Too much / Too early
Materials / Purchased Parts not available
Over- / Under-committing Capacity
Potential
Performance
Current
Performance
25
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Finding a simple & robust SCM solution for
ABB that is generic enough to be used by all factories
TOC Research Projects
1
ABB Goal:
Profitable Growth
2.1
Reliability/Avail ability
Competitive
Edge
2.2
Rapid Response
Competitive
Edge
3.1.1
Remarkable
Due Date Perf
& Availability
3.1.2
Selling
Reliability/Availabi lity Selling as
Comp. Edge
3.1.3
Coping with Sales
Growth
3.2.1
3.2.2
Remarkable
Rapid
Response
Protective
Capacity for
RR orders
3.2.3
3.2.4
Selling Rapid
Response as
Comp. Edge
Expanding
RR Client
Base
Sales
How to QUOTE reliable due dates with internal
Constraint? i.e. Not over-/undercommit
Procurement Planning Execution
How do we maintain High
RM
Availability with Low
Inventory?
How do we control release of ETO, MTO &
MTS WO’s for
Low WIP/high
CCR utilization?
26
How do we maintain right priority of
ALL WO’s on shop floor?
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Ongoing Improvement
How do we continuously
Improve flow by identifying & removing local optima & other
“hidden” disruptions/
CCRs to improve flow?
Finding a simple & robust SCM solution for
ABB that is generic enough to be used by all factories
TOC Research Projects
1
ABB Goal:
Profitable Growth
2.1
Reliability/Avail ability
Competitive
Edge
2.2
Rapid Response
Competitive
Edge
3.1.1
Remarkable
Due Date Perf
& Availability
3.1.2
Selling
Reliability/Availabi lity Selling as
Comp. Edge
3.1.3
Coping with Sales
Growth
3.2.1
Remarkable
Rapid
Response
3.2.2
Protective
Capacity for
RR orders
3.2.3
3.2.4
Selling Rapid
Response as
Comp. Edge
Expanding
RR Client
Base
4.11.1 (Sales)
TOC’s
PLANNED
LOAD (PL) for Quoting
Safe Due
Dates
4.11.2 (Buying)
TOC’s
DYNAMIC BUFFER
MGT ( DBM) & TOC
Replenishment
(TOCR) for Inventory
Mgt
4.11.3 (Planning) 4.11.4 (Execution)
TOC’s
RELEASE
CONTRO ( S-DBR ) to control WIP
TOC’s
SINGLE PRIORITY
SYSTEM
Buffer Mgt (BM) to keep priorities synchronized
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
4.11.5 (Improve)
TOC’s
BUFFER
ANALYSIS to
Focus Process
Improvements &
Capacity Elevation
Defining, communicating & validating the proposed ERP changes using S&T structure
TOC Research Projects 1
ABB Goal:
Profitable
Growth
TOC’s PLANNED LOAD DETAILS
4.11.1
Quoting Safe Due Dates using CCR(s) Planned Load
2.1
Reliability/Avail ability
Competitive
Edge
Why is the change needed?
Necessary
Assumption
3.1.1
Remarkable
Due Date Perf
& Availability
4.11.1 (Sales)
TOC’s
PLANNED
LOAD (PL) for
Quoting Safe
Due Dates
What is the objective of the change?
Strategy
Why will the change achieve the objective?
Parallel
Assumptions
How will the change be
implemented?
Tactic
•
•
When Sales/Planning accept an order due date which the factory cannot achieve, it jeopardize ABB’s Reliability CE.
Even if the constraint is in the market, fluctuations in demand or supply can cause specific resources (CCRs) to be overloaded. Under such circumstances, quoting fixed lead times is very likely to result in missed due dates resulting in poor DDP.
Due-dates given by the sales force/planning are (almost) always met even during periods of capacity overloads ( Target: 99% DDP)
• It is relatively easy to meet all due-dates when the commitments are given based on actual planned loads on the
CCR(s) and S-DBR and BM are in place to control release & align priorities.
•
The ERP systems can be modified to provide (within mins) a safe due date based on CCR(s) planned load + ½ Production
Time Buffer (if CCR is about in middle of flow)
1. Safe Due-date are given according to first available slot on CCR(s) + ½ Production Time Buffer
2. The ERP system is modified to provide Safe Due
Date based on CCR Planned Load + ½ PTB within
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
4.11.1
Quoting Safe Orders Due Dates using CCR(s) Planned Load
Tactic
1. Safe Duedate are given according to first available slot on CCR(s) + ½ Production Time Buffer
TOC Research Projects
CCR
Back Orders Overdue
Material
Order Date
Supply Time Buffer (STB)
Material
Release Date
Production Time Buffer (PTB)
½ PTB ½ PTB
Safe
Due Date
Quote this
“safe” due date to customer
29
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
4.11.1
Quoting Safe Orders Due Dates using CCR(s) Planned Load
Tactic
2. The ERP system is modified to provide Safe Due Date based on CCR Planned Load + ½ PTB within minutes and Sales/Planning is trained to use it.
TOC Research Projects
30
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Defining, communicating & validating the proposed ERP change using S&T structure
TOC Research Projects 1
ABB Goal:
Profitable
Growth
TOC REPLENISMENT & DBM DETAILS
4.11.2
2.1
Reliability/Avail ability
Competitive
Edge
3.1.1
Remarkable
Due Date Perf
& Availability
Why is the change needed?
Necessary
Assumption
What is the objective of the change?
Strategy
Why will the change achieve the objective?
Parallel
Assumptions
Maintaining Optimum RM & PP Inventory Levels
•
•
Having too much Raw Material (RM) and or Purchased Parts
(PP) in the stores or ordering too early can easily drain the company’s cash /WH space.
• Having too little RM, PP can and most frequently do cause delays that can cause lost production and potentially missed due dates (jeopardizing building of a “Reliability” Comp.
Edge)
.
The target levels of RM & PP inventories held are continuously monitored and when needed are suitably modified (not too much/too little)
• TOC;s Dynamic Buffer Management & Replenishment of RM &
PP Inventory, is a robust mechanism that enables setting, replenishing & adjustment of inventory targets, according to the actual level of demand & supply ensuring low levels of
• inventory& high availability.
Most ERP systems do not provide a mechanism for auto resizing inventory target levels based on actual changes in
4.11.2 (Buying)
TOC’s DYNAMIC
BUFFER MGT ( DBM)
& TOC
Replenishment
(TOCR) for Inv Mgt
How will the change be
implemented?
Tactic
Reliable Replenishment time (Rt=OLT + SLT)
2. Inventory levels are maintained by replenishing on actual consumption & resizing on buffer penetration
3. The ERP system is modified to enable DBM & TOCR
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
4.11.2
Maintaining Optimum RM & PP Inventory Levels with DBM / TOCR
Tactic
1. Target Levels are sized based on Max Demand within Reliable Replenishment time (Rt=OLT + SLT)
2. Inventory levels maintained by replenishing on actual consumption & resizing on buffer penetration
TOC Research Projects
TOC Replenishment & Dynamic Buffer Management Rules
What are the New TOC Planning, Execution & Feedback Rules…
300
200
100
Stock in Pipeline Stock on Hand
TOC Planning Rule : Size Buffer Target Level based on “Peak Demand within Reliable Replenishment Time”
TOC Execution Rule : Order daily & Replenish up to Target Level frequently (e.g. daily) on actual demand
TOC Feedback Rule : Re-size buffers based on red-zone penetration
Auto Up-size Buffer based on level of Red-zone penetration
Auto Down-size Buffer based on no Yellow Zone penetration
400
Actual
Demand
Month 1 Month 2
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
4.11.2
Maintaining Optimum RM & PP Inventory Levels with DBM / TOCR
Tactic
1. The ERP system is modified to enable DBM & TOCR functionality
1.
SAP TOC DBM & Repl. GUI
TOC Research Projects
2. Graph showing resizing of Stock Buffers
TOC DBM & Replenishment
3. List of Buffers requiring Resizing ( proposals to purchaser, not automated until validated )
33
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Defining, communicating & validating the proposed ERP change using S&T structure
TOC Research Projects 1
ABB Goal:
Profitable
Growth
TOC RELEASE CONTOL (S-DBR) DETAILS
2.1
Reliability/Avail ability
Competitive
Edge
3.1.1
Remarkable
Due Date Perf
& Availability
4.11.3 (Planning)
TOC’s RELEASE
CONTROL ( S-
DBR ) to control
WIP and improve
T, DDP & LT
4.11.3
Why is the change needed?
Necessary
Assumption
TOC Release Control to prevent Over-production
•
•
Having too many orders on the shop floor masks priorities, promotes local optima behavior and therefore prolongs the lead-time and significantly disrupts due-date-performance
(DDP).
•
Having too little orders on the shop floor will cause starvation of CCRs and cause lost production and potentially missed due dates (jeopardizing building of a “Reliability” Comp.
.
Edge)
The shop floor is populated ONLY with orders that have to be filled within a predefined horizon.
What is the objective of the change?
Strategy
Why will the change achieve the objective?
Parallel
Assumptions
•
•
In traditionally run plants touch time is a very small fraction (<10%) of the lead time.
Vast experience shows that, in traditionally run plants, restricting the release of materials, to be just half the current lead time before the corresponding due date, leads only to good results and to no negative ramifications* (lead time shrinks to
• less than half, DDP improves considerably, throughput goes up and excess capacity is revealed). These results are achieved irrespective of whether or not a bottleneck exists.
* Except for environments which are dominated by heavily dependent set-up matrixes. Those environments have to be dealt in a different way.
How will the change be
implemented?
Tactic
1. For each group of products currently having similar lead times, a buffer time is set to be equal to 50% of the current avg lead-time. Orders are released to the floor only a buffer time before their committed due-date, and if all materials are available. (WIP frozen until its time arrives).
2. The ERP system usage is modified to support S-DBR release
34 control and automatic material availability check.
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
4.11.3
Controlling the Release in Manufacturing (MTO/ATO)
Tactic
1. Target Levels are sized based on Max Demand within Reliable Replenishment time (Rt=OLT + SLT)
2. Inventory levels maintained by replenishing on actual consumption & resizing on buffer penetration
TOC Research Projects
S-DBR Planning (Release Control) Solution
Shipping Buffer for MTO
GREEN ZONE
1. Raw Materials for Stock Manuf Parts Release based on “Replenish Frequently on Actual Consumption
YELLOW ZONE RED ZONE
Shipping Buffer for ATO
GREEN ZONE YELLOW ZONE RED ZONE
2. Raw Material for Non-Stock Manuf Parts Release
= DD – MTO Shipping Buffer
Manuf Parts Release Date = Due Date – ATO Shipping Buffer
RAW MATRL RELEASE (ROPE)
Part # Qty OD DD Buffer Type
P001 5 05/2 04/3 66% Time
P002 10 07/2 07/3 30% Stock
MANUF PARTS RELEASE
Part # Qty OD DD Buffer Type
M001 5 05/2 04/3 66% ATO
M002 10 07/2 07/3 20% Cust
MPS = DRUM = ORDERS
Part # Qty Due Date Buffer
FG001 5 13/3 66%
FG002 10 16/3 23%
Stock Manuf (Common) Parts
1.1
1.2
2.1
2.2
2.3
Non-Stock (Unique) Manuf Parts
3.1
GREEN ZONE YELLOW ZONE
RM3
RED ZONE
3.2
2.4
3.3
4.1
Part sales to customers
Quote LT’s on Planned CCR Load
“Customer”
Orders
CCR
5.1
5.2
FG
SHIPPING
35
Definitions
Buffer Status = (Buffer Time – Remaining Duration) / Buffer Time
Red Zone = Time req’d for expediting a medium-sized order
PP1
PP2
Defining, communicating & validating the proposed ERP change using S&T structure
TOC Research Projects 1
ABB Goal:
Profitable
Growth
2.1
Reliability/Avail ability
Competitive
Edge
3.1.1
Remarkable
Due Date Perf
& Availability
4.11.4
(Execution)
TOC’s Buffer
Mgt (BM) as synchronized
SINGLE
PRIORITY
SYSTEM
TOC SINGLE PRIORITY SYSTEM DETAILS
4.11.4
Why is the change needed?
Necessary
Assumption
Single Priority System to Synchronize Execution
• Hectic priorities (hot, red-hot and do-it-NOW) cause chaos on the floor
• Even when material release is properly choked, not having a priority system can cause some orders to still be late..
The shop floor is governed by a simple, yet robust, priority system
What is the objective of the change?
Strategy
Why will the change achieve the objective?
Parallel
Assumptions
• Vast experience has shown that when work is released according to set time buffers, excellent results are obtained by using a crude priority system that is based solely on the time lapsed since the release.
• Buffer Management (BM) is setting priorities only according to the degree the buffer-time is consumed (four color code system - green: less than one third of the buffer time passed is lowest priority and black: more than the time buffer passed is the highest).
How will the change be
implemented?
Tactic
1. TOC Buffer Management is the ONLY priority system used on the shop floor.
2. The ERP system (and MES/RFID systems) are modified to ensure the Purchase Order List, “Work-to-List” and
Distribution Shipment List are prioritized based on buffer status (1
36 st Black, 2 nd Red, 3 rd Yellow, 4 th Green)
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
4.11.4
Single Priority System to Maintain Execution Synchronization
Tactic
1. Target Levels are sized based on Max Demand within Reliable Replenishment time (Rt=OLT + SLT)
2. Inventory levels maintained by replenishing on actual consumption & resizing on buffer penetration
TOC Research Projects
SAP
Customer Production
Orders do have “Due
Dates”
Stock Replenishment
Orders do not have “Due
Dates”
37
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Defining, communicating & validating the proposed ERP change using S&T structure
TOC Research Projects 1
ABB Goal:
Profitable
Growth
2.1
Reliability/Avail ability
Competitive
Edge
3.1.1
Remarkable
Due Date Perf
& Availability
4.11.5 (Improve)
TOC’s BUFFER
ANALYSIS to
Focus
Improvements
& Capacity
Elevation
TOC BUFFER ANALYSIS (POOGI) DETAILS
4.11.5
Why is the change needed?
Necessary
Assumption
Focusing Mechanism for Process Improvement/Elevation
•
Most local improvement initiatives in manufacturing, which use good tools (Root Cause analysis, Lean and Six Sigma techniques) do improve the local performance but, many times, those local improvements do not translate into global improvements
•
Not having sufficient protective capacity results in long LT & poor DDP
All local improvements initiatives in manufacturing do contribute meaningfully to the global performance and there is enough protective capacity for high DDP
What is the objective of the change?
Strategy
Why will the change achieve the objective?
Parallel
Assumptions
If a CCR exists, work-in-process piles up in front of it. When materials release is restricted, the only work centers that have work-in-process piling up in front of them are the real
CCRs.
CCRs can be identified also by recording “what black & red orders were waiting for?”
In most of the cases additional capacity can be exposed by better EXPLOITATION like:
- Ensuring that CCRs do not take lunch or shift change breaks,
Offloading work from the CCRs to less “effective” work centers that have ample excess capacity,
- Using LEAN /Six Sigma techniques to shrink the set-up time/reduce variation on the CCRs,
- ELEVATING capacity with overtime or capex approval for the CCRs, etc.
How will the change be
implemented?
Tactic
1. For all Red & Black Orders and Stock Buffers, Production
Supervisors / workers/purchasers record “what was black/red order waiting for?”
2. CCRs are identified and effectively removed through focused process improvement / elevation to the extent that most loaded resource has at least 20% protective capacity.
38
3. The ERP (and MES) systems are modified for POOGI.
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
4.11.5
Focusing Mechanism for Process Improvement/Elevation
Tactic
1.
For all Red & Black Orders an Stock Buffers, Production Supervisors record “what was black/red order waiting for?” extent that most loaded resource has at least 20% protective capacity.
39
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
“TOC in SAP” solution design: Order Processing Part I
TOC Research Projects
40
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
“TOC in SAP” solution design: Order Processing Part II
TOC Research Projects
41
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
“TOC in SAP” solution design: Determination of
Earliest Due Date
TOC Research Projects
42
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Results from Brno (Czech Republic) and Vaasa
(Finland)
TOC Research Projects
“After analyzing SAP recommendations and data from nearly 2 months, we are confident that the the TOC rules were implemented correctly and that we are now confident that we can switch of our Off-line & 3 rd Party systems.
The new Dynamic Buffer Management Functionality enables us to react quickly to changes in inventory values, which was not possible earlier, as we didn’t have time to monitor values manually.
We are very happy, are continuing to use the functionality and will be expanding it to other product lines”
Operations Managers
43
Factories in Brno and Vaasa
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Next Steps
TOC Research Projects
Implemented " TOC and SAP ” now in 8 factories:
• in Brno, Czech Republic
• in Chonan, Korea, 2 factories
• in Vaasa, Finland, 2 factories
• in Baroda, India
• in Przasnysz, Poland, 2 factories
And planning the implementations (in the work queue)
• In Vaasa, Finland, 3rd factory
• in Dalmine, Italy
• in Ratingen, Germany. Has “SDBR in MES”
• in Xiamen and Beijing China
• in Skien, Norway.
• … until all 300+ factories are reached…
44
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
• The “ TOC in SAP ” initiative, showed that the ambitious goal of “One-
SimpleABB” can be achieved even in the management of operations
(Planning & Execution and Continuous Improvement) in complex and different operational conditions.
• The partnership between ABB and Goldratt Research Labs made it possible to:
− Define a ROBUST enough TOC Planning, Execution and Continuous
Improvement solution that could cope with all the variations and complexities of 300+ factories
− Define a SIMPLE enough TOC Solution which could be supported with
relatively small modifications within a standard ERP system such as SAP.
− Break new ground by using the Strategy & Tactic Tree to define, communicate and get buy-in for the new TOC solution in a way that focused and accelerated the achievement of consensus and development of the required SAP functionality …which is also accelerating all new SAP implementations
− Deliver this project and its associated results in a record time for SAP
45 solution design, development and testing in less than 9 months ….
TOC Research Projects
• Stefan Forsmark, Operations Manager for ABB’s Power Products Division/BU Transformers.
• Thomas W. Schmidt, IS Manager for ABB’s Power Products Division
• Goethe Wallin, Operations Manager for ABB’s Power Products Division/BU Medium Voltage
• Karol Kaczmarek, Global Project Manager Operational Excellence, ABB BU Transformers
• Erich Beeler, IS Manager, ABB BU Transformers, Engineering IS
• Dr Katja Rajaniemi, Global Process Improvement Manager, ABB BU Medium Voltage
• Bill Vick, Global Operations Improvement Manager, ABB BU Medium Voltage
• Miroslaw Bistron, Leader of Manufacturing IS program, ABB’s Power Products Division
• Lukasz Krupa, Leader of Manufacturing IS program, ABB’s Power Products Division
• Fredrik Nordstrom, ABB GF Q&O / ODG
• Vesa Enestam, Eliaps Oy, SAP SCM Consulting
• May-Jing Li, Project Manager, ABB Group Function IS, 'One Simple ABB' and SAP R/3
• Martin Korthaus, SCM II Consulting, SAP
• John Trip, Goldratt-TOC Ltd
• Dr Alan Barnard, CEO, Goldratt Research Labs
• Eli Schragenheim, Principal, Goldratt Schools
• Dr Eli Goldratt, Chairman, Goldratt Group
46
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
THEORY OF CONSTRAINTS
CASE STUDY 2
Finding & Testing a solution to
SHORTAGES & SURPLUSES within Book Publishing
Presented By:
Date:
Dr. Alan Barnard (CEO Goldratt Research Labs, TOCICO Chairman 2003-2006)
27 th August 2009
© 2004 TOCICO. All rights reserved.
47
TOC Research Projects
1.
Generic Research Problem
1. Extent and Consequences of Shortages & Surpluses
2. Cause(s) & Direction of Solution
2.
Case Study: Random House Publishing
1. Publishing Industry Background
2. Random House Company Overview
3. Phase 1: Quantifying the Extent, Consequences & Causes
4. Phase 2: Finding a Solution
5. Phase 3: Testing the Solution
3.
Research Findings
4.
Future Research
48
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Extent & Consequences of SHORTAGES
TOC Research Projects
1.
How many of YOU frequently don’t find what you want at a SHOP?
* Either because the retailer was “Out-of-Stock” (OOS) or it decided not to carry the item you wanted?
2.
What is YOUR (consumer) response to this SHORTAGE ?
− Come back later to same retailer to buy same product ?
− Buy a similar product from same retailer and same supplier ?
− Buy a similar product from same retailer but different supplier ?
− Go to other retailer to buy same product ?
− Do not buy anything?
What is the consequences of this SHORTAGE on:
CONSUMER SHOP
SUPPLIER
49
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
BANK
Consequences of SHORTAGES on Profitability
For Book Publisher and Retailer…
TOC Research Projects
Quantifying impact of 1% Lower Sales Volume on Net Profit
INSIGHT: 1% Lost Sales = 10% reduction in Profits
BELIEF: Lost Sales is not significant (2 – 3%) since today, consumers that want our products can in most cases find it somewhere .
FEAR: Is it really worth it to invest in trying to further reduce Shortages ?
CHECK : How do we know shortages (out-ofstock) is really “only” 2-3%?
Does it match our experience as Consumers?
50
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
INDUSTRY RESEARCH: Extent, Consequences
& Consumer Response to SHORTAGES
TOC Research Projects
Results from International GMA Research Study (2002)
Title: “Retail Out-of-Stocks: A Worldwide Examination of Extent, Causes and Consumer Responses”
Scope: 661 Retail Outlets, 32 Product Categories, 71,000 Consumers Interviewed, 29 Countries
Impact on Lost Sales & Profitability
Retailers Lost Sales
8 to 9% OOS x (9+31=40%) Consumer Response = 3 to 4%
Supplier Lost Sales
8 to 9% OOS x (9+26=35%) Consumer Response = 3 to 4%
But at 1:10 Leverage, 3 – 4% Lost Sales = Lost Profitability of 30 to 40%
What about SURPLUSES?
51
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Extent & Consequences of SURPLUSES
TOC Research Projects
1.
How many of YOU have recently gone into a SHOP and bought something you did not really want / need simply because the shop offered a BIG discount ?
2.
How frequently does this happen to YOU?
−
Once a year?
−
Once a month?
− Once a week?
What is the consequence of this SURPLUSES on:
?
CONSUMER SHOP
SUPPLIER
52
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
BANK
Consequences of SURPLUSES on Profitability
For Book Publisher and Retailer…
TOC Research Projects
Quantifying impact of 1% Discount (Lower Price) on Net Profit
INSIGHT: 1% Discount in Price = 20% reduction in Profits
BELIEF: Consumers are VERY sensitive to pricing...and discounts is necessary since lower prices = more sales
FEAR: Reducing discount / increase in price WILL reduce sales much more
CHECK : Are consumers REALLY that sensitive to Price?
Is it not possible to significantly reduce SURPLUSES (that lead to discounts)?
53
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Another important consequence of SURPLUSES
TOC Research Projects
1.
Where is the real Constraint in the Consumer Goods
Supply Chain (e.g. for printed books)?
− Number of Customers willing to buy (books)…
…and what limits customers to buy more of the available books
(OR what prevent retailers to sell more books)?
− Shortages (Out-of-Stocks) OR
− Shelf Space available in Book Shops to display all available books that would sell if they were available to buy...
2.
What is the consequences of SURPLUSES on
“Exploiting” the Retailer’s shelf space?
Surpluses is like having BRICKS on the Shelf…
…and BRICKS = LOST SALES of non-stock items selling elsewhere
54
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Previous attempts to solve the problem
TOC Research Projects
• More Sophisticated (and expensive) Forecasting Systems to predict consumer Demand…and more Collaboration efforts to share forecasts and supply problems
• Implementing Central & Regional Distribution Centers
(CDC / RDC) to improve availability and responsiveness
• Bar Coding, High Tech Materials Handling & EDI
Significant improvements in availability at CDC and RDC’s
(95 – 98%) and in responsiveness (daily deliveries)…
But…did it really improve Shortages and
Surpluses at Retail level and if not, WHY?
55
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Challenges in reducing SHORTAGES & SURPLUSES
TOC Research Projects
• What makes reducing Shortages and Surpluses so difficult in Consumer Goods?
− Large number of “Stock-Keeping-Units (SKUs)
− Unpredictable and High Variation in Demand and Supply
− Inter-dependencies between SKUs
• So, off-course, with this complexities, it is a very difficult decision on what to order, when to order and how much ?
• This decision determines not only the success of retailer , but also the success of the distributor, manufacturer and material supplier .
So, who do we leave this critical & complex decision to?
…and Are these people really in the best position to decide?
56
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Cause(s) of SHORTAGES and SURPLUSES
TOC Research Projects
100
Order
LT
Supply
LT
Surpluses
Stock Level based on customers ordering large batches typically monthly
(based on inaccurate
F/Cast)
Order
LT
Supply
LT
ROP
25
Actual Demand
Stock Level based on customers ordering daily or weekly based on with actual consumption
Month 1 Month 2 Month 3
Shortages
The KEY to achieve “profitable availability of more SKU’s” is to get each link to
ORDER LESS MORE FREQUENTLY
(START)
….rather than the traditional practice of
,,,
ORDER MORE LESS FREQUENTLY
(STOP)
Yes, BUT…the Cause and Solution has been known for long time, so why don’t we see MORE Supply Chains adopting this…especially BOOK Publishing
57
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
• The publishing industry, due to slow or even declining sales , has been under SEVERE pressure to find ways to improve for many years …
• The book publishing industry think shortages is low but has experienced very high returns
(surpluses) for many years ( no-sale-return policy )
* A Typical Book Publisher have 30% - 50% returns of all books printed
• Many Book Publishers & Retailers assumed that high returns was simply the “ price you pay ” to not lost any sales…but most still considered it as an improvement opportunity
* A Typical Book Publisher’s Print & Distrib. Costs is only 30% of Selling Price
58
Pile’em high….
Watch’em fly…”
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
• In February 2008, Goldratt Research Labs was approached by Random House Publishing.
• They are considered one of the best in managing returns, and still have 28% of every book printed returned to be shredded.
• There were no reliable data about the level of surpluses
(and or shortages within retailers), and it appeared as if the consequences of these were not fully understood.
Could Theory of Constraints help to quantify the extent, consequences and causes of the problem… and help to find a solution?
59
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
• Market Position: Random House is the world’s largest general-interest book publisher , with ore than 11,000 new books issued a year and 500 million books sold annually
• Employees: 5,779 (as of December 31, 2008)
• Revenues: € 1.7 billion (Fiscal Year 2008)
• Shareholders: Bertelsmann AG (100%)
• Published Authors include : F. Scott Fitzgerald, Ernest
Hemingway, John Gresha, Danielle Steel, Dan Brown and
Barack Obama…
60
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
The Pressure to improve….
Random House Income Statement in € millions 2008 2007 2006
Revenues
Operating EBIT
EBIT % of Sales
1,721
137
8.0%
1,837
173
9.4%
Employees (in absolute numbers) 5,779 5,764
2005
1,947
182
9.3%
5,804
2004
1,828
166
9.1%
5,395
1,791
140
7.8%
5,383
What would be the impact of a significant reduction in
Surpluses on profitability …?
61
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
IMPACT of Reducing Returns on Profitability
For Book Publisher…
TOC Research Projects
Quantifying impact of Reducing Returns from 30% to 15% on Net Profit
INSIGHT: 50% reduction in returns = 50% increase in Profits
FEAR: But what if Changes to reduce Returns causes Sales Volume to drop?
Lets use Theory of Constraints to analyze the situation…
62
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
• Is it possible to reduce returns without reducing sales?
• Is “High Returns” the only “cost” of surpluses at retail level?
• What is the “real level” of unavailability (shortages) of books at retail level?
• Is it possible to do much better…?
… and if so, what changes would be needed in the way the links in the Book Publishing Supply Chain is managed?
63
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
PROFITABILITY
Potential
Profitability
GAP
Price lower than PoV
Avoidable Discounts
Cost of Avoidable Returns
Lost Sales (Non-Stocked)
Lost Sales (Stocked)
Current
AVAILABILITY
Surpluses
Shortages
Potential
Availability
GAP
Current
But how do we quantify the impact of Surpluses /
Returns (and Shortages) on Profitability?
64
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Applying TOC’s 5 Focusing Steps to the
Book Publishing Supply Chain…
TOC Research Projects
Step 1: IDENTIFY the System’s Constraint
“Until the consumer has bought, nobody has really sold…”
The System Constraint therefore is the No. of Consumers willing to buy
Step 2: Decide how to EXPLOIT the System’s Constraint
“Exploiting the System Constraint” means “Having the Right Product, at the right place and right time (when consumer is ready to buy).
What conditions block better exploitation?
1)Shortages of Products already stocked
2)Unavailability of Products that sell elsewhere but which is not stocked due to shelf-space constraints (occupied by Surpluses ).
Actually Surpluses in a retail shop is like having bricks on the shelf…
Step 3: SUBORDINATE everything to the above decision
Change any Policy, Measurement and or Behaviour that contribute to current high level of both Shortages and Surpluses
YES
, BUT, how to we find these and will it really be a win:win
65 to change these…
Project Timeline
TOC Research Projects
Project Start
Conference
Call to share
Simulation
Develop simulation to
Test
Test impact of
“Less more
Frequently” real damage & extent of validate damage of with 12 Test
Surpluses & PUSH and Shops and with
Shortages
TOC Evaluation
Share generic TOC benefits of
PULL analysis & solution
Customized S&T
Dr. Goldratt with
Exco construct
B&N data to shortages & surpluses customized S&T and plan Test
Analyse Test Results
Analyse Test
Results for 12
Test vs. Control
Shops and agree on next steps
Feb
2008
March
2008
April
2008
June
2008
July
2008
Nov
2008
So, what was the process we used to find and test a
“ SIMPLE & ROBUST ” solution to the problem of
SHORTAGES and SURPLUSES …
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
Book Publishing Research Challenge #1
What makes quantifying the Extent, Consequences and
Causes of Surpluses & Shortages so difficult?
• Despite excellent “Point-of-Sale” data available from most retailers,
Publishers do not have visibility of actual shortages and surpluses at retails.
• Retailers can buy directly from Publishers (to get best price) or from
Wholesalers (to get best availability and response).
• Therefore, knowing the availability (or unavailability) at one
Publishers and Wholesalers do not give a true picture of unavailability at retail level.
Is there a simple way to quantify the likely level of shortages and surpluses at retail level?
67
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
Benefit of “flagging” the stock-outs in red ...
68
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
Stock-out Lost Sales
= Stock-out Days x Sales Velocity/day
= 8%
Surpluses Lost Sales
= Surplus Days x Replacement Sales Velocity/day
= 7%
69
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Typical Book Store – Concentration Analysis
TOC Research Projects
NOTE: Above Data for period of 185 Weeks (1/1/2005 - 7/18/2008)
10% of Titles generates 65% of Total Sales
95% of Titles sell at less than 1unit/wk
25% of titles had ZERO sales over the 3 year period
VERY Large opportunity to replace “SURPLUSES”
Where “Surplus” = Zero Sales Titles and Titles with Sales Velocity of <1/month with display of >1unit
70
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
70
Overcoming the challenges to reduce shortages & surpluses in Book Publishing
TOC Research Projects
Book Publishing Research Challenge #2
What makes reducing Surpluses & Shortages so difficult?
• Uncertainty of consumer demand
• Weak incentives for retailers & distributors to improve returns…due to an industry policy of “No Sales-Return Any time” creates an incentive to rather order too much than too little..
• Distributors & retailers create buffers for the same “end-consumer demand.
• Printing & Binding economies of scale that drive large batches.
• A strong held belief that “Title visibility in the marketplace drives demand (but there is little research to quantify this relationship)
• Supply chain constraints like warehouse proximity and limited rush reprint capacity at printers
The goal is to print & distribute closer to what
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Cause(s) of SHORTAGES and SURPLUSES
TOC Research Projects
100
Order
LT
Supply
LT
Surpluses
Stock Level based on customers ordering large batches typically monthly
(based on inaccurate
F/Cast)
Order
LT
Supply
LT
ROP
25
Actual Demand
Stock Level based on customers ordering daily or weekly based on with actual consumption
Month 1 Month 2 Month 3
Shortages
The KEY to achieve “profitable availability of more SKU’s” is to get each link to
ORDER LESS MORE FREQUENTLY
(START)
….rather than the traditional practice of
,,,
ORDER MORE LESS FREQUENTLY
(STOP)
Yes, BUT…the Cause and Solution has been known for long time, so why don’t we see MORE Supply Chains adopting this…especially BOOK Publishing
72
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Change in Inventory Profile in moving from
PUSH to PULL (less more frequently)
TOC Research Projects
SKU Target Level = Maximum Demand with Reliable Replenishment Time
Where RRt = Order LT + Supply LT)
OLT = Daily
SLT = 1 to 4 weeks
OLT = Daily
SLT = 1 to 4 days
OLT = Daily
SLT = 1 to 2 days
PUSH
Inventory
Profile
1-4wks
PRINTER
1 - 4days
PUBLISHER
CDC
PUBLISHER
RDCs or
RETAILER CDC
RETAILERS
73
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
PULL
Inventory
Profile
TOC Research Projects
Planning Rule : “Be Paranoid but not Hysterical”
Target Stock Level for each Title at each Storage Location = Maximum
Demand within Reliable Replenishment Time
Execution Rules:
Replenish up to Target level in sequence of buffer status more frequently (e.g. daily)
Feedback Rules:
Adjust Target Level (Buffer Size) based on
Level of Buffer Penetration
Too little
Good
Enough
Too much
Time / Stock Buffer
400
Auto Upsize Buffer based on level of Redzone penetration
Auto Downsize Buffer based on lack of
Yellow zone penetration
300
200
100
Actual
Demand
Month 1 Month 2 Month 3
74
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Testing Robustness of TOC’s Dynamic
Buffering regardless of Demand Pattern
TOC Research Projects
Stable Sales Launch Event
Special Event
75
© 2006, Alan Barnard, Goldratt Group. All rights reserved.
Seasonality Events
TOC Research Projects
• In general, Goldratt Research Labs have found that if a company reports formally a 13% “Lost Sales” due to unavailability of product, improving availability to close on 100% (to end consumer) typically will result in increase in sales of 10 to 30%
•
The Table below shows the results from actual implementation tests:
Industry Official
Lost Sales
Availability before TOC
Availability after TOC
Avg Increase in Sales within
1 st year of TOC rollout
Fruit Supplier 2-5% 85 -90% >98% 30%
(worst 5%, best 200%)
Bread & Flour
Supplier
2-5% 80-95% >99% 20%
(worst 5%, best 300%)
Cosmetic
Supplier
2-5% 90-98% >99% 10%
(worst 2.5%, best 50%)
Sportswear
Supplier
10-20% 80 – 85% >97%
(Total Inv down
60%)
25%
(worst 10%, best 100%)
Note: In reality, most “lost sales” are not recorded. The dramatic increase in sales achieved with improved availability verifies this.
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© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
1. Acceptance Rate?
• % of Shops accepting the offer for the Publisher to “Replenish
Daily on Actual Consumption
2. Difficulty to setup up RTC system?
• How difficult would it be to set up a system for a shop to share daily sales with the publisher and to receive daily deliveries?
3. Really Win:win (Value = Benefits – Costs)?
• What will be the impact “Less more Frequently” on Shortages
(Out-ofStock) and Surpluses and on Lost Sales…?
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© 2006, Alan Barnard, Goldratt Group. All rights reserved.
TOC Research Projects
Similar level of “Stockouts” before and after the Launch of Test
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© 2006, Alan Barnard, Goldratt Group. All rights reserved.
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TOC Research Projects
Zero “Stock-outs” after the Launch of
Test !
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© 2006, Alan Barnard, Goldratt Group. All rights reserved.
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TOC Research Projects
• Importance of knowing how to answer simple question of “ By how much has Sales gone up ?” due to this change...
• Very high level of acceptance rate of offer to replenish daily based on actual sales (>80%)
• “Replenishing Daily on Actual Consumption” can help significantly reduce Shortages & Surpluse:
− Sales Increase by preventing Shortages around 2.5-10%
− Sales increase by replacing Surpluses (if done on wide enough scale) can be 5-20% .
• Implementing Dynamic Buffer Management (with so many SKUs) and frequent bad decisions is expected to increase Sales even more
• Replacing a BRICKS with any Item that sells will increase Sales
(BRICKS = More than Needed / Really Slow Runner)
• Major leverage opportunities to reduce SURPLUSES & SHORTAGES are the really HIGH Runners and the LOW Runners (1’s, 2’s & 3’s that should be 0’s,1’s & 2’s)…
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© 2006, Alan Barnard, Goldratt Group. All rights reserved.
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TOC Research Projects
BASE GROWTH ENHANCED GROWTH
Rollout to directly serviced Shops in
demand exists for those titles
Tactics:
The Co. provides
replenishment to daily consumption
Strategy:
estimate of the resulting benefits from providing better availability ( “Good Enough”:
The reliability of the estimates enables a clear decision)
Tactics:
RH carries out a carefully monitored test of “high availability ” on a
TOC Research Projects
“Your FOCUS ( or lack of it ) will determine your reality …”
For more information….
visit
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© 2006, Alan Barnard, Goldratt Group. All rights reserved.