Koç University OPSM 301 Operations Management Class 3: Process selection Zeynep Aksin zaksin@ku.edu.tr Process Selection Video Back to Shouldice wrap-up from last class Classification of Processes by process architecture Project Job Shop Job Shop Process-focused Batch Line flow Continuous Flow Flow Shop Product-focused Matching Process Choice with Strategy: Product-Process Matrix Process Flexibility High JOB SHOP Jumbled Flow. Process segments loosely linked. (Commercial Printer, Architecture firm) BATCH Disconnected Line Flow/Jumbled Flow but a dominant flow exists. (Heavy Equipment, Auto Repari) LINE FLOWS Connected Line Flow (assembly line) Continuous, automated, rigid line flow. Process segments tightly linked. Low (Auto Assembly, Car lubrication shop) CONTINUOUS FLOW (Oil Refinery) Low High Standardization Commodity Products High volume High Few Major Products Many Products Low Standardization One of a kind Low Volume Product Variety Organization of Production Processes Project: the product remains in a fixed location – Manufacturing equipment is moved to the product Job shop (Workcenter): similar equipment or functions are grouped together Assembly line: work processes are arranged according to the progressive steps by which the product is made Continuous process: assembly line, only the flow is continuous such as with liquids Project Layout One of a kind products are produced The Job Shop Process Process Layout One of a Kind Build – (To Customer Order) Absence of Rigid Flow Pattern Usually High Product Mix The Job shop similar equipment or functions are grouped together • High variety, low volume production Routing matrix based upon flow of parts Process Layout Lathe#1 Drill Press #1 Drill Press #2 Lathe#2 Paint Machine Lathe#3 Packaging Machine #1 Lathe#4 Packaging Machine #2 Product #1735B: Start of Production Finish Production Job-Shop Process Examples (Also called process focused) Bank Hospital © 1995 Corel Corp. © 1995 Corel Corp. Machine Shop © 1995 Corel Corp. 11 Process Focused Strategy Pros & Cons Advantages – Greater product flexibility – More general purpose equipment – Lower initial capital investment Disadvantages – High variable costs – More highly trained personnel – More difficult production planning & control – Low equipment utilization (5% to 25%) The Flow Line Process Product Layout Discrete Parts Rigid Flow Pattern Product Mix of Standard Products Product Layout Product #1735B Start Production Lathe Drill Press #2 Drill Press #1 Paint Machine Packaging Machine #2 Finish Production Product-Focused Strategy Pros & Cons Advantages – Lower variable cost per unit – Lower but more specialized labor skills – Easier production planning and control – Higher equipment utilization (70% to 90%) Disadvantages – Lower product flexibility – More specialized equipment – Usually higher capital investment Positioning Inventory in the Supply Chain Raw Material Components Semifinished Finished Assemble-to-Order Make-to-Order Engineer-to-Order Forecast Order CLIENT SUPPLIER Make-to-Stock Production Processes Terms Lead time: the time needed to respond to a customer order Customer order decoupling point: where inventory is positioned to allow entities in the supply chain to operate independently Types of Firms Make-to-stock firms: Firms that serve customers from finished goods inventory Assemble-to-order firms: firms that combine a number of preassembled modules to meet a customer’s specifications Make-to-order firms: that make the customer’s product from raw materials, parts, and components Engineer-to-order firm: firm that will work with the customer to design and then make the product Make to Stock Examples of products – Televisions – Clothing – Packaged food products Essential issue in satisfying customers is to balance the level of inventory against the level of customer service – Easy with unlimited inventory but inventory costs money – Trade-off between the costs of inventory and level of customer service must be made Assemble-to-Order A primary task is to define a customer’s order in terms of alternative components since these are carried in inventory – An example is the way Dell Computer makes their desktop computers One capability required is a design that enables as much flexibility as possible in combining components There are significant advantages from moving the customer order decoupling point from finished goods to components Make-to-Order and Engineer-to-Order Boeing’s process for making commercial aircraft is an example Customer order decoupling point could be in either raw materials at the manufacturing site or the supplier inventory Depending on how similar the products are it might not even be possible to preorder parts Assignment 1 from Universal Pulp and Paper case-individual assignment Read the Universal Pulp and Paper (UPP) case from the course pack (available at the photocopy center) What are the main products of UPP? Identify the four product attributes for each product type. Explain each attribute with facts from the case Which process type is appropriate for each product type? Support your argument with facts from the case and process attributes you need for each product type.