Validity of Bills of Material (SAP Library

Validity of Bills of Material

Use

From an organizational perspective BOMs are valid for a particular maintenance planning plant. The planning plant is therefore the area of validity.

You can extend this area of validity by assigning the same BOM to a different maintenance planning plant or further plants.

If a piece of equipment is moved from its original plant, you can assign the equipment bill of material to another plant.

If a piece of equipment is moved dynamically from one plant to the next, you can assign its bill of material to several plants.

Prerequisites

Before you assign a BOM to a different or further plants, the following prerequisites must be met:

Material master records must exist for the materials in the BOM at each of the different plants.

If a unit of issue has been maintained for a BOM item, this unit of measure must be identical for each of the different plants.

You must have the necessary authorization in your user master record to assign the BOM to different plants.

For more information on how to extend the area of validity for a BOM, see Allocating Bills of Material to a Plant.

Features

In addition to spatial validity from an organizational perspective, you can also assign a temporal validity to the BOM. When you change a BOM item, for example, when you replace one material with another, you can specify precisely when the change becomes effective by defining a period of validity.

The period of validity for a bill of material (BOM) is restricted by the following entries in the BOM header and BOM item:

Valid-from Date

When you create a BOM, the point at which it becomes effective is determined by this date. If you create or change a BOM using a change number, the system takes the valid-from date from the change master record.

Valid-to Date

This date determines the end of the validity period for the BOM. The system enters this automatically. The default value in the system is 31.12.9999. If you change the BOM using a change number with a valid-from date, the validity period for the object (BOM header or BOM item) before the change ends at exactly 0.00 o’clock on this date.