Understanding Material Requirements Planning for Production Controlled Items
You can generate a material requirements plan for:
A single item.
All items.
Only items that are affected by transactions since the plan was last generated.
When you generate a material requirements plan, the system evaluates selected information, performs calculations, and recommends a time-phased replenishment plan for all selected items. MRP output consists of information in the time series, action messages, and pegging. MRP output consists of information in the time series, action messages, and pegging.
You use the MRP/MPS Requirements Planning program (R3482) to create and manage material requirements plans.
You run the MRP/MPS Requirements Planning program to generate an MRP plan by item. You must set the Process Planning processing option on the Mfg Mode tab to a value of 2 to consider production numbers when generating the MRP plan.
The system uses the standard supply and demand inclusion rules during MRP generation to drive the demand and supply calculations for production controlled items.
The MRP/MPS Requirements Planning program uses the demand from the production number as another dimension of supply and demand for production controlled items. The system does not consolidate the demand from two different production numbers. MRP plans for each combination of item and production number demand.
MRP reads the Item Location Tag File table (F41021T) and matches on-hand supply with demand from forecast and sales orders.
If the Receipt Routing Quantities processing options on the On Hand Data tab of the MRP/MPS Requirements Planning and On Hand tab of the Master Planning Schedule - Multiple Plant programs are set to 1 to include receipt routing quantities in on-hand inventory, then MRP reads the Purchase Order Receiver File (F43121) and Purchase Order Receipt Routing File (F43092) tables. MRP identifies and adds the quantities in the in transit, inspection, quantity 1, and quantity 2 buckets as on-hand supply for a specific production number. MRP does not use the F41021T table for items in receipt routing as the in transit, inspection, quantity 1, and quantity 2 fields are not in the F41021T table.
Messages generated for production controlled items contain a production number. However, messages for production controlled items do not contain a production number if the parent item in a multilevel bill of material is not production controlled.