Chapter 10
Inventory
Learning
outcomes
- The purpose of
inventory
- Types of inventories
- Important inventory
concept
- Inventory costs
- Inventory planning
- Inventory control
What is
inventory
• Inventory refers to all the
materials, goods, and supplies a
company holds, from raw
materials to finished products,
that are stored for production,
shipping, or sale, and is
crucial for efficient supply
chain operations and meeting
customer demand.
• Inventory is a critical part of
the supply chain, bridging the
gap between production and
customer fulfillment.
• Inventory management involves
overseeing, controlling, and
optimizing stock levels to
balance costs with the need to
meet customer demand and fulfill
orders efficiently.
Types of
Inventory
• Raw materials: Materials used in the
production process.
• Work-in-process (WIP): Partially
completed goods in the production
process.
• Finished goods: Products ready for
sale.
• Maintenance, repair, and operations
(MRO): Materials used for maintaining
equipment and operations.
• Anticipation Inventory: Held to meet
anticipated future demand.
• Cycle Inventory: Held to meet the
normal flow of demand.
• Safety Stock: Extra inventory held to
buffer against unexpected demand or
supply issues.
Important inventory concept
Balancing the need
for meeting customer
needs with the cost
of holding inventory.
This involves the
following strategies:
• Forecasting
• Determining optimal stock
levels
• Managing the various
inventory types
Inventory
Costs
• Inventory costs are the
expenses a business incurs
from the time it acquires
inventory until it's sold
or disposed of.
• They go beyond the initial
purchase price,
encompassing costs related
to storing, handling, and
managing the inventory.
• Effective inventory
management is crucial for
businesses to minimize
these costs and optimize
operations.
Types of
inventory costs
• Purchase Costs:
• The direct expenses of acquiring inventory,
including the cost of goods, transportation,
and any associated taxes or duties.
• Holding Costs (Carrying Costs):
• Expenses incurred to store inventory, such as
warehouse rent, utilities, insurance, and
potential costs due to obsolescence,
shrinkage, or damage.
• Ordering Costs:
• Expenses associated with placing orders,
receiving inventory, and processing payments.
• Stockout Costs:
• Costs incurred when a business runs out of
inventory, including potential lost sales,
expedited shipping costs, or customer
dissatisfaction.
Inventory cost formula
Total Inventory Cost = Cost of Goods
Purchased or Produced + Additional Costs
Additional costs include storage, handling,
insurance, and other expenses related to
holding and managing inventory.
Why are inventory costs
important
• Profitability:
High inventory costs can eat into a company's profits, so understanding
and controlling these costs is vital.
• Cash Flow:
Holding large amounts of inventory requires significant capital,
potentially
straining a company's cash flow.
• Efficiency:
Effective inventory management can streamline operations, reduce waste,
and improve customer satisfaction.
• Supply Chain Optimization:
Understanding inventory costs helps businesses optimize their supply
chains, ensuring the right amount of inventory is available at the right
time.
Invent
ory
Planni
ng
Inventory planning is the process of
determining the optimal quantity and
timing of inventory to align with sales
and production capacity.
It involves forecasting demand,
considering lead times, and managing
stock levels to minimize costs and avoid
stockouts.
It's a key function of modern inventory
management, aiming to optimize inventory
levels to meet customer needs while
minimizing holding costs.
It's about making strategic decisions on
when to reorder and in what quantity.
Key aspects of
inventory
planning
•
Forecasting:
Accurately predicting future demand is
crucial for effective inventory planning.
•
Demand Planning:
Using data from customer demand patterns,
market trends, supply patterns, and
historical sales to generate a demand plan
that predicts product needs over a specified
period.
•
Lead Time Management:
Understanding the time it takes to receive
inventory from suppliers is essential for
timely ordering.
•
Inventory Costs:
Balancing the costs of holding inventory
(storage, insurance, etc.) with the costs of
stockouts (lost sales, customer
dissatisfaction).
Key aspects of inventory
planning cont.
Supplier
Relationships:
Having strong
relationships with
suppliers can help
ensure reliable and
timely deliveries.
Assortment Planning:
Deciding which
products to stock and
in what quantities,
based on demand and
seasonality.
Inventory Management
Software:
Utilizing software to
track inventory
levels, forecast
demand, and manage
orders can
significantly improve
efficiency.
Inventory control
The process of managing and coordinating the
purchase, storage, and utilization of products
to ensure an adequate supply while minimizing
holding costs and avoiding surpluses or
shortages.
Key Aspects of
Inventory
Control
• Purpose:
To optimize inventory levels, meet
customer demand, and minimize costs
associated with holding stock.
• Scope:
Encompasses all aspects of managing a
company's inventories, including
purchasing, shipping, receiving,
tracking, warehousing, storage,
turnover, and reordering.
• Importance:
Effective inventory control is crucial
for business operations and
profitability, as it helps prevent
overstocking, understocking, and
associated inefficiencies.
Benefits of
inventory
control
• Reduced Costs: Minimizes
holding costs, storage
expenses, and potential
losses from expired or
damaged goods.
• Improved Customer
Satisfaction: Ensures timely
fulfillment of orders and
prevents stockouts.
• Enhanced Efficiency:
Streamlines operations by
optimizing inventory flow and
reducing manual processes.
• Better Visibility: Provides
insights into inventory
levels, trends, and potential
Invent
ory
contro
l
method
s
Demand Forecasting: Predicting future
demand to optimize inventory levels.
Reorder Point: Establishing a point at
which to reorder inventory to avoid
stockouts.
Inventory Tracking Systems: Utilizing
software or systems to monitor inventory
levels and movements.
Just-in-Time (JIT) Inventory: Minimizing
inventory levels by receiving materials
just as they are needed for production.
ABC Analysis: Categorizing inventory items
based on their value and importance to
focus efforts on high-value items
The End
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