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Operations Management

Stock control charts and reorder levels

  • 2 things to know
  • Components 01, 02 and 03

Overview

Recall questions on stock control, reading a stock control chart and its sawtooth pattern, buffer stock, reorder levels and lead time, calculating reorder levels, lead times and reorder quantities, maximum stock levels, longer lead times, rising demand, stock-outs, and the cost of excess buffer stock.

What you need to know

Answer each one before you reveal it.

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Key term

What does a stock control chart show?

Key term

Why does a stock control chart typically show a sawtooth pattern?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is meant by stock control?

    Model answer

    Managing the quantities of raw materials, work in progress and finished goods held so that production can continue without holding more than is needed.

  2. 2

    What does a stock control chart show?

    Model answer

    How the level of stock changes over time, marking the maximum stock level, the reorder level, the buffer stock and the points at which deliveries arrive.

  3. 3

    Why does a stock control chart typically show a sawtooth pattern?

    Model answer

    Stock falls steadily as it is used in production and then rises sharply when a delivery arrives, and the cycle repeats.

  4. 4

    What is buffer stock?

    Model answer

    A minimum level of stock held in reserve to cover unexpectedly high demand or a late delivery.

  5. 5

    What is the reorder level?

    Model answer

    The stock level at which a new order is placed, set so that the delivery arrives before stock falls below the buffer.

  6. 6

    Define lead time in stock control.

    Model answer

    The time between placing an order with a supplier and the stock arriving.

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