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Operations Management

Stock control diagrams and stock levels

  • 3 things to know
  • Component 1

Overview

Maximum stock level, re-order level and lead time.

What you need to know

Answer each one before you reveal it.

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Key term

What does a stock control diagram show?

Key term

What is the maximum stock level?

Key term

What is the re-order level?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What does a stock control diagram show?

    Model answer

    A stock control diagram plots the level of stock held against time. Sawtooth lines show stock falling as it is used and jumping when a delivery arrives.

  2. 2

    What is the maximum stock level?

    Model answer

    The maximum stock level is the largest quantity a business is willing to hold. Storage space, cost and the risk of deterioration set that limit.

  3. 3

    What is the re-order level?

    Model answer

    The re-order level is the stock level at which a fresh order is placed. The level is set high enough to cover usage during the lead time.

  4. 4

    What is lead time?

    Model answer

    Lead time is the period between placing an order and receiving the delivery. A longer lead time forces a higher re-order level.

  5. 5

    What is buffer stock?

    Model answer

    Buffer stock is the minimum level a business plans never to go below. The reserve protects production against a late delivery or a surge in demand.

  6. 6

    What is the re-order quantity?

    Model answer

    The re-order quantity is the amount ordered each time stock reaches the re-order level. Larger orders earn bigger discounts but raise the cost of holding stock.

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