Manage equivalent assignment scopes across BOMs

Many manufacturing facilities create assemblies with a variety of subassemblies, such as an automotive roof with one sunroof and another with two sunroofs. Engineers sometimes create equivalent assignment scopes for units to create a modified part or assembly while retaining the base part. A part or assembly in a source BOM such as an engineering bill of materials (EBOM) might start out with a limited occurrence effectivity (for example, 80 units). You could then reference a different instance with an additional assignment scope of 20 units with one subassembly, and 60 units with a different subassembly.

This example shows how to apply and modify unit effectivity in the EBOM and manufacturing bill of materials (MBOM), as well as how to assign parts across equivalent assignment scopes and align those parts between EBOM and MBOM. The process starts with a base airplane wing that includes 80 wing end assembly units to be manufactured. In the image below, LH Wing End Assembly - 00 has an element effectivity value of 1-80.

You can assign equivalent scopes from multiple EBOM assemblies to a single MBOM installation assembly, or assign scopes from multiple EBOM assemblies to similar MBOM installation assemblies. This new capability builds upon other alignment commands in Teamcenter Manufacturing Process Planner EBOM-MBOM management.

Assign equivalent scopes from multiple EBOM assemblies to a single MBOM install assembly

Procedure

1. In the EBOM, select LH Wing End Assembly - 00, and in the MBOM, select an assembly to which you want to install its parts (in this example, INSTALL - 10029/A;1-WING), and then click Focus .

Note If you have enabled manufacturing check in and checkout, click Check Out and Focus.

The EBOM and MBOM area that you can work in is temporarily reduced to the selected assemblies.

2. In the EBOM, select the parts in the assembly to be assigned to the MBOM, and in the MBOM, click Assign .

The parts in LH Wing End Assembly - 00 are assigned to INSTALL - 10029/A;1-WING, but the EBOM displays mismatches to indicate that the MBOM does not share the same effectivity as the EBOM.

Tip If a Net Effectivity Mismatch (Outside Focus) icon is displayed in the EBOM, the icon indicates that an object is assigned outside the current focus in the BOM Alignment page. Click the icon to confirm the external location:

  The Net Effectivity Mismatch (Outside

Focus) feature is displayed only if you or your administrator have set the value of the preference MBM_HideOutOfScopeIndications to false.

3. In the MBOM, select Manage →Element Effectivity , and in the Element Effectivity dialog box, search for and select the same effectivity as that applied to LH Wing End Assembly - 00 in the EBOM.

4. Click Add, and in the confirmation prompt, click Update Assignment Indication.

Assignment indications in the EBOM update to indicate a full match.

The manufacturer determines that the wings should include two different wing ends, and wants to reduce the effectivity of LH Wing End Assembly - 00 to 20 and LH Wing End Assembly - 01 to 60.

5. In the EBOM, select LH Wing End Assembly - 00, in the MBOM toolbar, choose Assign → Element Effectivity , and in the Element Effectivity dialog box, delete the existing effectivity and either search and locate, or add an effectivity with values of 1 to

7. Select LH Wing End Assembly - 01 and either search and locate, or add an effectivity of 21-80.

The parts in LH Wing End Assembly - 00 are mismatched again, as indicated by the assembly level partial match icon . This is because the effectivity of that assembly is 1-20, and that of the MBOM assembly INSTALL - 10029/A;1-WING is still 1-80.

Some parts in LH Wing End Assembly - 00 are commonly used in LH Wing End Assembly - 01. The two assemblies share the same root IDIC, but Manufacturing-BOM Manager is unable to communicate the net effectivity between these common parts without matching part IDICs.

7. In the EBOM, select LH Wing End Assembly - 01, and in the MBOM, select INSTALL - 10029/A;1-WING.

8. Select Manage → Align Equivalent .

9. In the confirmation prompt, click Align, and in the second confirmation prompt stating that the two assemblies are now aligned, click Update Assignment Indication.

The IDICs are now stamped to the common parts in LH Wing End Assembly - 01, on the basis of each part's item ID and position (in Teamcenter Manufacturing Process Planner, absolute transformation matrix value). Aligned parts are considered the same part when the system confirms the assignment state. The EBOM displays full matches because net activity computes for all parts common to LH Wing End Assembly - 00 and LH Wing End Assembly - 01.

10. In the EBOM, select the remaining unassigned parts in LH Wing End Assembly - 01 with blank status icons, and in the MBOM, select INSTALL - 10029/A;1-WING, and then click Assign .

The parts are assigned, but mismatch icons for non-common parts are still visible in the EBOM assemblies LH Wing End Assembly - 00 and LH Wing End Assembly - 01, because effectivity in these EBOM assemblies is set to 1-20 and 21-80, respectively, and INSTALL - 10029/A;1-WING in the MBOM is set to 1-80.

11. In the EBOM, click Validate Effectivity Coverage , and in the Validate Effectivity Coverage dialog box, drag the start and end points of each MBOM occurrence to modify its unit effectivity range, and click Save.

Assign equivalent scopes from multiple EBOM assemblies to similar MBOM installation assemblies

The process for assigning equivalent scopes from multiple source (EBOM) assemblies to multiple target (MBOM) installation assemblies is in many ways the same as assigning equivalent scopes from multiple EBOM assemblies to a single MBOM installation assembly, but involves creating another installation MBOM assembly to separately define the two scenarios. This example builds on the example shown above in Assign equivalent scopes from multiple EBOM assemblies to a single MBOM install assembly.

Procedure

1. In the EBOM, select LH Wing End Assembly - 01, and in the MBOM, select INSTALL - 10029/A;1-WING.

2. Click Add → Create Based On to create a new manufacturing element based on the selected element. The root element is duplicated, while the structure under it is reused (referenced).

In the Create Based On dialog box, the ID of the selected element is displayed in the ID text box.

3. To create a new assembly with the ID as the name, leave the Name text box blank; to append additional text to it, type the text to be appended in the Name text box, and click Create.

Example ID = INSTALL - 10052, Name = WING 2; assembly name = INSTALL - 10052 WING 2.

The new assembly is created beneath LH Wing End Assembly - 01 and references the same parts, with the same IDs and revisions, but does not duplicate the source assembly's element effectivity.

4. (Optional) Change the source and copy the effectivities of assemblies, assign any required additional parts, and use other commands, such as Align Equivalent and Update Assignment Indications, to align the EBOM and the MBOM as appropriate.