Exploding the Bill of Material

Use

If you have allocated a material with a bill of material (BOM), a sales order BOM, or a WBS BOM to an activity, you can explode this BOM in the network level-by-level or completely (multi-level).

You need to explode a bill of material, if

  • You want to maintain subordinate components in the BOM

  • The header material is not planned using MRP, but you want to trigger MRP for subordinate components

  • You want to change the structure of the bill of material as used in the current network.

For more information, see BOM Explosion

If the material component was already allocated to the activity before the BOM explosion, you have the following options.

  • You select the component and proceed as below. When you do this, the "header" material is assigned the item category T (text item) which means that no requirements will be generated for it, just for the subordinate items.

  • If you do not select the component, but enter it manually in the dialog box, it remains allocated to the network with the original item category. You can delete this component or define it as an assembly item , by giving it a negative requirements quantity.

Procedure

  1. On the Component Overview screen for an activity, choose Start of the navigation path Components Next navigation step Explode BOM. End of the navigation path

  2. The BOM selection dialog box appears.

  3. Enter the necessary data, for example for a WBS BOM the WBS element for which the BOM was created. The default value for the requirements quantity is the Execution Factor in the activity. You can explode the BOM level-by-level or all at once (multi-level).

  4. If you explode the BOM all at once, requirements could be generated both in the network and in MRP, depending on control of the BOM items. Since MRP always explodes the complete BOM, this could lead to multiple requirements for the same component.

  5. Choose Continue.

  6. A list of all the BOM items appears. You expand or compress multi-level BOMs by choosing or . Choose to display the BOM as an overview tree of the BOM structure in which phantom assemblies are shown as such.

    Document items are not displayed, since the system does not copy document items to network activities.

  7. Select the items that you want to allocate to the network in the list or the tree and choose Copy .

  8. If necessary, check the data for inventory management and account assignment.

  9. Save the network.

See also:

BOM transfer