Remove Relation for MBOM Viewer

The MBOM viewer is a function of the MBOM tools. Both products and manufacturing assemblies are taken into consideration in the calculation of the MBOM.

Additional information on the MBOM viewer can be found in the chapter Viewing and Exporting an MBOM.

In up to and including R15, only the relations process first process product and - process creates products were taken into account when creating the MBOM:

In R16 further products that have been removed from the process structure (process removes process) as well as products that have again been added after being removed (process process product) are taken into account in the calculation of the MBOM.

If a product is removed from the process structure, it is not contained within the MBOM. If a product is again added to the process structure it will again be treated as input. This procedure has the same effect as if you had linked the product to a process with the relation process first process product.

The following table shows the possible relations and their meanings:

Relations for the process flow
Relations Description
Process first processes product An input product is linked to this relation, i.e.: a product is processed for the first time in this set process sequence. An input product can be a completely new product or a product that was previously processed in a prior process sequence.
Process creates product An output product is linked via this relation, i.e.: a product is processed for the last time in the process sequence. The product has reached the planned processing stage in this process sequence.
Process removes product

A product can be removed from the process structure with this relation.
Process processes product A product can again be added to the process structure with this relation.

The procedure is explained in the following section with several examples and schematic diagrams.

Workplan - example
 

The following relations are taken into consideration in the following examples:

  • process first process product, process removes product, process process product, process create product. 

Legend for schematic diagrams of the examples

Colored marking of the relations in the examples

  • process first process product

  • process create product

  • process removes Product

  • process process product

Abbreviations for processes, manufacturing assemblies and single parts

MA(P1,P2) = Manufacturing assemblies with single parts e.g. P1 and P2.

ACT = Process (Activity)

Workplan - example 1

In this example, the product is first added (ACT1) and in the next step it is removed again (ACT2).

In this example the MBOM of the work plan is empty because product P1 was first added to the process (ACT1) with the relation Process first  process product and was removed again in the following process (ACT2) with the relation process removes product.
 

Workplan - example 2

In this example, products are added, removed again, and created.

In this case the MBOM contains only the manufacturing assembly MA1 with the two products P1 and P2, since the product P3 was removed in the process (ACT2) with the relation process removes product. Both products P1 and P2 are marked as input and output - input ACT1 with process first process product and output ACT3 with process creates product.

Workplan - example 3

In this example, product P3 is first removed and then added again. In addition products P1, P2, P3 and P4 are assigned to both manufacturing assemblies MA1 and MA2.

In this case the MBOM contains all products, since the product first removed, P3, was added again in the process (ACT4) with the relation process process product.
  You will arrive at the same result as in example 3 if the process structure of the work plan looks like this:
 

Limitations for MBOM viewer
  After you have executed the MBOM viewer on a selected process, the MBOM viewer is created on the basis of the relations for the selected process and its process structure (parent - child relation of processes), regardless of whether a single part or manufacturing assembly is involved.  Previous and subsequent processes are not taken into consideration in the MBOM viewer.

In this example the MBOM viewer is created for the selected process ACT4. The process ACT4 does not have any children, thus only the relation process process product of the process ACT4 with the product P3 is taken into consideration when the MBOM is created.

In this case the MBOM viewer is empty because P3 is the only product that is linked to the process ACT4. In the MBOM viewer only products that are marked either as input process first process product or as output process create product are taken into consideration.
P3 is part of the MBOM if the following criteria are fulfilled:
  • Criterion 1: Single part P3 is added in previous processes (in the example for ACT1 and ACT2) (process first process product) and then removed again (process removes product).

  • Criterion 2: These previous processes (ACT1, ACT2) must be taken into consideration when the MBOM viewer is created.

    • Summary: Criterion 1 has been fulfilled but not criterion 2: P3 is marked neither as input or output -- this is the reason that the MBOM viewer for the selected process (ACT4) is empty in this case.

    In contrast, both criteria have been fulfilled if the MBOM viewer is executed for the node Workplan. In this case P3 is displayed in the MBOM viewer.