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Inventory and Supply Chain Management

Module Outline

Effective management of inventory and supply chains is crucial to ensure that supply matches demand, improving operational efficiency and customer satisfaction.

1

Matching Supply

Strategies to handle fluctuating demand.
2

Inventory Controls

Key concepts: ROL, Buffer Stock, Lead Time.
3

Supplier Management

Criteria for selection and relationship optimization.
4

SCM & Outsourcing

Coordination, technology, and strategic benefits.

Matching Supply to Demand Strategies

Operations managers use various strategies:

Operations managers use various strategies to ensure supply matches fluctuating demand:

  • Outsourcing: Contracting third-party suppliers or manufacturers to handle production or services during peak demand periods allows flexibility without increasing permanent capacity.
  • Use of Temporary and Part-Time Employees: Hiring flexible labor forces helps ramp up production quickly when needed and reduce labor costs at low demand times.
  • Producing to Order: Also called make-to-order, this method produces goods only when a customer places an order. It reduces inventory costs and helps cater to individual customer preferences but may increase delivery times.

Key Inventory Control Concepts

Managing inventory involves balancing having enough stock to meet demand without incurring excessive holding costs.

⏱️

Lead Time

The time between placing an order with a supplier and receiving the goods.
⚠️

Re-order Level

The inventory level at which a new order is placed.
🛡️

Buffer Stock

Extra stock held to cover unexpected increases in demand or supply delays.
📦

Re-order Quantity

The amount ordered to replenish stock once the re-order level is reached.

Inventory Formula (Re-order Level Components)

Re-order Level = Demand during Lead Time + Buffer Stock
The calculation ensures safety against stockouts by considering average demand during lead time plus buffer stock.

Value of Outsourcing

✅
The ProsOutsourcing can improve flexibility, reduce costs, and provide access to specialist skills. Allows businesses to focus on core competencies.
❌
The ConsRequires careful management of supplier relationships and quality standards to avoid risks.

Inventory Cost Balance (Conceptual)

Managing inventory involves balancing ordering costs with holding costs (Economic Order Quantity models).

Cost Factor Type Impact
Ordering Costs (e.g., Shipping) High Frequency Increases Total Cost
Holding Costs (e.g., Storage) Large Stock Levels Increases Total Cost
Inventory Control Charts Visual Tools Shows Ordering Points
Goal Minimize Total Inventory Costs

Effective SCM Key Practices

Effective supply chain management coordinates all activities from raw material sourcing to delivering finished products.

✓

Communication and Collaboration

Sharing forecasts and inventory data with suppliers to reduce uncertainty.
✓

Inventory Management

Using JIT or other inventory systems.
✓

Technology

ERP and supply chain software enhance coordination.
✓

Risk Management

Planning for disruptions.

Supplier Selection Criteria

Selecting suppliers involves considering multiple factors beyond just pricing.

Factor Price Reliability Proximity Ethical Flexibility Capacity
Description Competitive On-time Delivery Reduce Transport Sustainable Handle Changes Required Volume
Importance High Vital Moderate Growing Moderate Vital

Pro Tip: Relationship Value

🤝

Supplier Performance: Good supplier relationships improve supply chain performance. Focus on communication and shared goals.

Inventory Trade-Off Debate

🧐
Why does longer Lead Time influence my buffer stock amount?
💡
Longer lead times increase the buffer stock needed because you have a larger window where unexpected demand or delays could cause stockouts.
Inventory and Supply Chain Management Deck
Term
Main Goal

What is the main goal of inventory and supply chain management?

Answer
Explanation

To match supply with demand, improving efficiency and customer satisfaction.

Term
Outsourcing

What is outsourcing in supply chain management?

Answer
Explanation

Contracting third parties to handle production or services during peak demand.

Term
Temporary Employees

How does hiring temporary employees help in supply chain management?

Answer
Explanation

It provides labor flexibility to adjust production based on demand.

Term
Producing to Order

What does "producing to order" mean?

Answer
Explanation

Producing goods only after a customer places an order, reducing inventory costs.

Term
Lead Time

Define lead time in inventory management.

Answer
Definition

The time between placing an order and receiving the goods.

Term
Buffer Stock

What is buffer stock (safety stock)?

Answer
Definition

Extra inventory held to cover unexpected demand or supply delays.

Term
Reorder Level

How is the reorder level determined?

Answer
Calculation

By calculating average demand during lead time plus buffer stock.

Term
Supplier Choice

What considerations influence supplier choice?

Answer
Factors

Price, reliability, proximity, ethics, flexibility, and capacity.

Term
Key Practice

Name a key practice for effective supply chain management.

Answer
Practice

Communication and collaboration between suppliers and the business.

Term
Outsourcing Benefits

What are the benefits of outsourcing in supply chain management?

Answer
Benefits

Increased flexibility, reduced costs, and access to specialist skills.

Term
Technology Role

What role does technology play in supply chain management?

Answer
Role

Enhances coordination through ERP and supply chain software.

Term
Risk Management

What is the importance of risk management in supply chains?

Answer
Importance

To plan for and minimize the impact of potential disruptions.

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📦 Inventory and Supply Chain Management Quiz

1. What is the primary purpose of buffer stock?

Buffer stock acts as safety inventory to prevent stockouts during supply or demand fluctuations.

2. Which of the following best describes producing to order?

Producing to order minimizes inventory as products are made once ordered.

3. Which factor is NOT typically considered when choosing suppliers?

Supplier marketing is less relevant than cost, reliability, and ethics.

4. What is the effect of long lead times on inventory?

Longer lead times require holding more safety stock to prevent shortages.

5. True or False: Outsourcing helps businesses focus on core competencies by delegating non-core activities.

Outsourcing allows firms to concentrate on what they do best and gain flexibility.

📊 Results

  • Notes and Quiz
  • Business
  • AS & A Level
  • Business Operations
  • AQA