Work Order Messages

When you process work order messages, the system creates work order headers in the F4801 table and assigns work order numbers. The system does not attach a parts list or routing information at this time.

You can process work order messages by using any of these methods:

• Process a single action message for an item.

• Process multiple action messages for an item.

• Process messages using a planning family.

• Process messages automatically.

The system first processes work order messages. Work order messages appear on the MRP/MPS Detail Message Revisions form with an order type of WO. The master schedule remains firm or does not change from the beginning date through the end date when the system processes these work order messages. These firm orders are not automatically replanned in subsequent MPS generations. However, if the subsequent MPS generation finds a mismatch between the supply quantities or dates and the demand quantities or dates, the program recommends realignment of the existing work orders.

When you use fixed order quantity (FOQ), MPS/DRP does not generate an Increase message for an existing order to cover demand. Instead, the system generates Order messages in multiples of FOQ as needed to cover the demand.

When you create or update an order, you can modify the status of the order to indicate the stage of production. To do so, enter a new status in the Status field. The system displays this field only for messages that are related to order processing.