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 Bill of Material (BOM) 

Definition

List of all materials required in a process together with the quantities required.

Use

The BOM is part of the master data of production planning and is also used in discrete manufacturing. However, note that the following features are specific to process industries:

  • In general, the BOM is created and edited directly from within the master recipe for which it is required.
  • By creating a production version, you can uniquely combine a master recipe with an alternative BOM. The material components of the alternative BOM can then be assigned to the operations or phases of the master recipe and be taken into account in material quantity calculation.

See also:

SAP Library

PP - Bills of Material Guide

Structure

You create a BOM for the product. In the BOM header, you define a base quantity of the material you want to produce. All other quantities are relative to the base quantity.

There may be several alternative BOMs for a product, which are used for different manufacturing processes, lot sizes, or validity areas.

You assign all other materials together with their quantities to the BOM as BOM items or material components. They include:

  • Ingredients with positive quantities
  • Output materials (that is, by-products and remaining materials) with negative quantities
  • Catalysts and
intra materials with two items respectively representing the material entering and leaving the process

Co-Products: Special Features

When

manufacturing co-products, you can create a BOM for a process material or for the co-product that in general initiates production.

You assign all other co-products to the BOM as BOM items with negative quantities and set the Co-product indicator for them. When you create an order, the system creates a separate order item for the co-products.

If you want the system to select the production versions and BOMs that use the order material as BOM items when you create a process order, you must have set the Co-product indicator in the material master.