MRP reads the requirement from:
Material Master View
Purchasing
MRP 1 and 2
Work Scheduling
Sales Order
Planned Independent Requirement
BOM
Routing Points to note:- If you have just changed the BOM and want to have the latest update. Execute with Planning Mode 2 - BOM is re-exploded
When you found that the MRP did not automatically Create the Purchase Requisitions for in-house production. Execute with Planning Mode 3 - Delete planning dates.
MRP can easily re-create Purchase Requistions and Planned Orders based on the latest requirement changes. Therefore, it is allright to execute with Planning Mode 3.
BOM - Do not built a BOM with a Material Type ROH Level 1 and Level 2, as MRP will not consider the requirement for Level 2 since it is a Raw Material. (no additional process required).
Level 1 ROH
...Level 2 ROH
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