Administering EBOM and MBOM

Comparing the EBOM and MBOM

The manufacturing engineer creates a manufacturing structure (MBOM or manufacturing bill of materials) from the product structure (EBOM or engineering bill of materials). The MBOM is a different arrangement of the EBOM that can be optimized for manufacturing purposes. You must specify two structures to be the EBOM and MBOM using the Link Structures command. When you link an EBOM with an MBOM, their BOM view revisions are linked by an METarget relation.

To ensure that all required parts in the EBOM are contained in the MBOM you can run an advanced accountability check. This feature uses the in-context ID (IDIC represented by the AbsOccID property) to establish logical equivalence between aligned occurrences. If you want to use this feature, you cannot use the in-context ID for any other purpose. Using an accountability check, you can see if parts have been added or removed from the EBOM, discern any property changes, propagate any changes from the EBOM to the MBOM, or run the accountability check at a scheduled time.

If you use Multi-Site Collaboration and want to consume a remote EBOM in the MBOM, you must create the in-context IDs for the BOM lines to be consumed at the owning site before you export the EBOM to a remote site. Otherwise, a check does not report differences between the structures.

Caution

You cannot link an EBOM to an MBOM contained in a composition structure context. If you use a structure context to hold the MBOM, you cannot use the alignment check feature.
Cutting and pasting the same line back into an MBOM creates a new occurrence without an in-context ID. This removes the equivalence between the new occurrence and the original source part in the EBOM and causes the pasted line to be displayed as missing in the other structure in an accountability check.