Glossary

ABC Analysis

An analysis that divides inventory into three groups. Group A is more important than group B, which is more important than group C.

Average Inventory

The average inventory on hand. In this chapter, the average inventory is Q/2 for the EOQ model.

Bill of Materials (BOM)

A material structure tree of the components in a product, with a description and the quantity required to make one unit of that product.

Carrying Cost

The cost of holding inventory over time.

Economic Order Quantity (EOQ)

The amount of inventory ordered that will minimize the total inventory cost. It is also called the optimal order quantity, or Q*.

Enterprise Resource Planning (ERP)

A computerized information system that integrates and coordinates the operations of a firm.

Instantaneous Inventory Receipt

A system in which inventory is received or obtained at one point in time and not over a period of time.

Inventory Position

The amount of inventory on hand plus the amount in any orders that have been placed but not yet received.

Just-in-Time (JIT) Inventory

An approach whereby inventory arrives just in time to be used in the manufacturing process.

Kanban

A manual JIT system developed by the Japanese. Kanban means “card” in Japanese.

Lead Time

The time it takes to receive an order after it is placed (called L in the chapter).

Marginal Analysis

A decision-making technique that uses marginal profit and marginal loss in determining optimal decision policies. Marginal analysis is used when the number of alternatives and states of nature is large.

Marginal Loss (ML)

The loss that would be incurred by stocking and not selling an additional unit.

Marginal Profit (MP)

The additional profit that would be realized by stocking and selling one more unit.

Material Requirements Planning (MRP)

An inventory model that can handle dependent demand.

Production Run Model

An inventory model in which inventory is produced or manufactured over time instead of being ordered or purchased. This model eliminates the instantaneous receipt assumption.

Ordering Cost

The cost of placing an order with a supplier.

Quantity Discount

The cost per unit when large orders of an inventory item are placed.

Reorder Point (ROP)

The number of units on hand when an order for more inventory is placed.

Safety Stock

Extra inventory that is used to help avoid stockouts.

Setup Cost

The cost to set up the manufacturing or production process for the production run model.

Sensitivity Analysis

The process of determining how sensitive the optimal solution is to changes in the values used in the equations.

Service Level

The chance, expressed as a percent, that there will not be a stockout. Service level=1Probability of a stockout.

Stockout

A situation that occurs when there is no inventory on hand.

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