Effectivity types of BOM
The change master record determines which effectivity conditions apply when a BOM is changed. You can either create a change master record with date effectivity (Valid-from date) or with parameter effectivity.
If you want to use company-specific criteria (instead of dates) to determine when changes are effective, parameters to define effectivity can be used then.
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Extending the Area of Validity of BOM
The area of validity (plant or group) that was defined when a BOM was created, can be extended. To do this, you allocate the same bill of material to a material in different plants.
- You can allocate a BOM created in a specific plant (such as 0001) to additional plants (such as 0002 and 0003) or to the entire group (blank).
- You can allocate a group BOM to individual plants.
These related BOMs are identified by a common internal BOM number in the standard SAP system. This internal BOM number is displayed on all screens for plant allocations.
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BOMs Effectivity
In the standard SAP system, validity areas and periods are used to define the precise conditions under which a bill of material is valid in different areas of a company.
Material BOMs can be valid on different organizational levels:
A material BOM can be used to manage data that applies directly to production. This is why the area of validity is the plant. The plant is the location where all necessary work-scheduling procedures are organized, such as MRP and creating routings.
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Basic Data : BOM of Material Master
Material BOM is a BOM with Reference to a Material
A bill of material that can be create for a material is known as a material BOM in the SAP System.
To create a material master in the SAP System, you can use the following functions:
Material > Create > Immediately
For this material, the SAP system creates a material master immediately, so that you can also create a BOM for it.
Material > Create > Schedule
For this material, the SAP system only generates a change document. This is why BOM cannot be created for the material at first.
Only when you activate the scheduled material does the SAP system create a material master record. Then you can create a BOM for it.
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BOM Categories in SAP
In the SAP System, BOMs (Bills of Material in SAP Production Planning) can be used to represent different objects (such as materials, equipment, functional location BOMs, and documents) and to maintain object-specific data.
Before you can create a BOM for the component parts of an object, the object must have a valid master record in SAP system.
The following shows the objects for which BOMs can be created.
- Material Master Record –> Material BOM
- Equipment Master Record –> Equipment BOM
- Document Info Record –> Document BOM
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Single-Level BOMs and Assemblies
A single-level BOM displays the assembly or sub-assembly with only one level of children. Thus it displays the components directly needed to make the assembly or sub-assembly.
You can break down large and complex product structures into a number of related units. Each unit can be represented by a BOM, referred to in this documentation as a single-level BOM.
A single-level BOM describes one or more assemblies by means of component quantities. In the following, the term single-level BOM will be shortened to BOM.
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