For BOM explosion according to a specific date, you define time intervals for each assembly and different BOMs are assigned to each of these time intervals. During the planning run, the system then checks the time intervals, which have been specified for the assembly and selects the alternative that is valid for the explosion date. The order start date of the planned order is set as the explosion date. The appropriate alternative is exploded and dependent requirements are created for the components.

If the system does not find a valid or an appropriate alternative BOM for the explosion date, it uses the BOM with the appropriate lot size.

You maintain the table for the selection of alternatives using date as follows:

1. Starting from the MRP menu choose Master data ® BOM by date.

The table for specifying the alternative BOM selection using the date now appears.

2. Enter the necessary parameters for each material whose alternative BOM selection is to be carried out using the date.
3. If you want to allocate several alternative BOMs with different time intervals to a material, you must determine the valid from date for each alternative in the Valid from field.

The valid from date of the subsequent alternative BOM marks the expiry date of the preceding alternative.

4. Save your entries.