The explosion of major assembly BOMs is a step that production planners need to perform if they have created an end item project from a template.
The sequence in which the installation kits of a major assembly are assembled is defined by a network. There should be one network for every major assembly.
Note
The networks can be reused for different major assemblies of the same end item.
The installation kits of a major assembly are defined in the major assembly’s BOM. The network should have activities for every installation kit. The BOM-PS interface manually triggers the explosion of the major assembly’s BOM via the Transfer Bill of Material app or CN33_N transaction, to assign installation kit reservations to corresponding network activities with matching reference points. This is a new app/transaction which has been introduced to better support the major assembly and installation kit process.
- This process is tailored for version-managed BOMs, selecting a released BOM version automatically if not specified, or allowing for specific BOM version explosions.
- The process creates serial numbers for projects and major assemblies used later in the genealogy report.
The Transfer Bill of Material app (or CN33_N transaction) explodes the major assembly’s BOM to determine the installation kits needed for a specific unit of the major assembly by evaluating parameter effectivity. It assigns a reservation for every required installation kit to a network activity if the reference points in the BOM item and in the network activity match.


In addition, the BOM-PS interface adds material component demand to the project for the different installation kits if the BOM item and the network activity have matching reference points.

Summary
This lesson covers executing the BOM-PS interface to manage BOM explosions for major assemblies effectively.
- Trigger BOM explosions using the Transfer Bill of Material app to assign installation kits to network activities.
- Ensure matching reference points between BOM items and network activities for accurate kit reservations.
- Use version-managed BOMs for precise assembly requirements and component demand.
- Incorporate serial numbers during BOM explosion for genealogy tracking.
- Leverage networks to define the sequence for assembling major assembly kits.