Understanding Backflush for Production-Controlled Items

If you did not manually issue material for a work order, you perform a completion with backflush. If you use backflushing, you report the issue transactions at completion or at operations that are defined as pay point operations for super backflush. For backflush to occur, an item must be set up with an issue code that enables the item to be backflushed.

You use the Work Order Completions (P31114) program to record completions with backflush.

The system enables you to consume the remaining required quantity from production-controlled items only when the required quantity of generic inventory is not available. You consume the remaining required inventory using either blind or interactive mode.

You set the Production Number On Hand Consumption processing option on the Work Order Completions program to blank to activate blind inventory issues.

When the Work Order Completions program is run to issue inventory blindly for production-controlled items, the algorithm:

1. Allocates generic inventory.

   Generic inventory is inventory for items that are not production-controlled and, therefore, are not associated with a production number.

2. Allocates inactive production numbers.

   These are production-controlled items that have the Production Number Status set to I in the Production Number Master File table (F34401).

3. Allocates orphaned production numbers.

   These are production-controlled items that are no longer associated with a supply or demand.

4. Allocates production number by end item demand date.

   This is the demand date of a production-controlled item that is the farthest in the future. The system then replans the end item to meet the demand.

If you set the Production Number On Hand Consumption processing option to a value of 1 to interactively complete work order issues through backflush, then the system displays the Select Inventory for Consumption form. You select the specific inventory and quantity to consume.

You must complete the Secondary Quantity field if the item you are completing through backflush is set up with dual units of measure in the item master record.

After you select the inventory to consume, you can access the Select Inventory to Consume form to review or redistribute inventory. You must have a value in the Quantity field to access the Prod No. Consumption option in the Row menu.

If the Backflush processing option on the Edits tab of the Work Order Completions program is set to perform blind work order issues, then the system follows the blind consumption logic by default.

The on-hand quantity for production-controlled inventory in the F41021T table does not go negative. Therefore, if the on-hand quantity for the production-controlled item is insufficient, then the F41021T table shows zero on-hand quantity and the Item Location File table (F41021) shows a negative on-hand quantity. All on-hand quantity for production-controlled items must be consumed before the on-hand quantity of generic items goes negative.

If the Negative Quantity on Hand processing option on the Edits tab of the Work Order Completions program is set to blank to allow negative on-hand quantity for an item, then discrepancies may occur in the F41021T table because quantity does not go negative for production-controlled items.