Managing effectivities
Update equivalent assignment scopes
Update equivalent assignment scopes to link equivalent MBOM assemblies, connected as assignment scopes to previous EBOM assemblies, to a newly created EBOM equivalent assembly.
Sometimes an engineering bill of materials (EBOM) assembly is created for a source EBOM assembly by adjusting the effectivity for new and existing EBOM assemblies. The source EBOM assembly might have one or more assignment scopes defined in the manufacturing bill of materials (MBOM), and the new, equivalent EBOM assembly must also be connected to the same MBOM's assignment scopes. Assignment connections ensure that the accountability check (assignment indications) between EBOM and MBOM show the correct results by considering the net effectivity for the nodes assigned from EBOM to MBOM.
Note
Equivalent assignment scopes were previously termed equivalent assignment domains in Teamcenter Easy Plan and Manufacturing-BOM Manager 6.1.3, and dash rolls prior to that release.
Procedure
If you have not done so already, search for and open an existing work package and navigate to the BOM Alignment page. In this example, the EBOM has two equivalent scopes with different effectivities .The MBOM has a manufacturing assembly that was created from EBOM assembly 0123-001. Because it was assigned to the MBOM from the EBOM, in the Assignment column, it displays the equivalent scopes from the EBOM assembly.
In the MBOM, create a referenced assembly with a different effectivity by doing the following.
Select the source assembly, and in the MBOM toolbar, click Add → Create Based On .
Define a different effectivity.
In this example, a new assembly is created from MfgASM-001, named MfgASM-002, and a different effectivity is defined: 6-UP (041289). In the Assignment column, MfgASM-002 is no longer linked to the second EBOM scope associated to MfgASM-001.
Select the equivalent EBOM and MBOM assemblies, and choose Manage → Align → Align Equivalent . In this example, from the EBOM, you would select 0123-002, and in the MBOM, you would select MfgASM-001.
In the EBOM, locate the second EBOM scope assembly to which the duplicate MBOM assembly is no longer associated.
In the EBOM, the second EBOM assembly shows a partially assigned status icon , indicating that it is not associated with all equivalent MBOM assignment scopes.
In the EBOM panel, right-click the new assembly and select Update Equivalent Assignment Scopes . Using the effectivity validation preferences MBMPropertiesForDashRollEquivalence and MBMRegExForDashRollIdentification, the system:
Searches the EBOM for any earlier assemblies that are equivalent to the selected assembly.
Searches the MBOM assignment scopes that are associated to EBOM assemblies, and associates all equivalent EBOM and MBOM assemblies. Note The system locates equivalent assemblies by verifying that they have identical absolute transformation matrices. If an assembly does not have a matching absolute transformation matrix, it is not compared.
Associates each equivalent EBOM assembly with each of the MBOM targets. In the EBOM, the second EBOM assembly, which previously displayed a partially assigned status icon , now shows a fully assigned status icon , indicating that it is now associated to all equivalent assignment scopes.
In this example, in the MBOM, MfgASM-002 is now linked to the same EBOM scopes as MfgASM-001.
Source: https://docs.sw.siemens.com/en-US/doc/282219420/PL20251212545240207.xid2214895/ijx1691084996777 · retrieved 2026-07-11