Backflush transactions ’pull’ components with Operation Pull and Assembly Pull supply types from inventory onto jobs and repetitive schedules. Backflush transactions can be launched by:

• Completing assemblies at operations using the Move Transactions window
• Moving and completing assemblies into inventory using the Move Transactions window
• Completing assemblies into inventory using the Completion Transactions window
• Receiving assemblies from an outside processing operation using the Oracle Purchasing, Enter Receipts window.

Move transactions imported through the Open Move Transaction Interface can also create backflush transactions. Transactions imported through the Oracle Inventory, Inventory Transactions Interface can also create backflush transactions.

Additional Information: Backflushing reduces the number of manual material transactions required to process the discrete jobs and repetitive schedules.

Reverse Backflush Transactions
You can reverse backflush transactions and automatically return backflushed components back to inventory. For example, pull components that are backflushed as you move assemblies to the next intraoperation step in a routing are automatically returned to inventory if you move assemblies to a previous step in the routing. Reverse backflush transactions can be created as you do the following:

• reverse operation completion transactions using the Move Transactions window
• return completed assemblies from inventory to jobs and schedules using the Completion Transactions
• move and return assemblies from inventory to jobs and schedules using the Move Transactions window
• return or correct transaction receipts in the Enter Returns or Enter Corrections windows in Oracle Purchasing.

Move transactions imported through the Oracle Work in Process Open Move Transaction Interface can also reverse backflush transactions as can return transactions imported through the Inventory Transaction Interface.
Note: You can, if necessary, issue and return pull components to and from jobs and schedules to inventory using the ’Specific Component’ option in WIP Material Transactions window

Revision Control For component items under revision control, the system always defaults the revision based on the item’s current revision as of the date of the transaction

Backflush Transaction Rules
The following rules are enforced when performing backflush transactions:

• an enabled default supply subinventory and, if required by the subinventory, locator must be defined for the component.
• routing references must be specified for non–standard discrete jobs.
• the component item must be transactable.
• the subinventory you are backflushing from must be an asset subinventory if the Oracle Inventory Allow Expense to Asset
• Transfer profile option is set to No.
• backflush quantities that are calculated as decimal values, must be at least five decimal places in order to create the backflush transaction
• yield calculations are based on exact requirements, rather than rounded values

Backflush Supply Subinventories and Locators
Supply subinventories and locators can be defined at the item or bill of material component level. If they are not defined, the system uses the supply subinventory and locator specified by the WIP Backflush Supply Subinventory and Locator Parameters when components are backflushed.
To ensure adequate supply for backflush transactions, you can replenish supply subinventories and locators as required

Negative Inventory Balances during Backflushing
You can use the following two Oracle Inventory settings to determine whether or not inventory balances can be negative:

•  Allow Negative Balances parameter: you use this parameter to specify whether or not negative inventory balances are allowed.
• Override Negative for Backflush profile option: you use this profile option to override a No setting on the Allow Negative Balances parameter during backflush transactions. This allows backflush transactions to drive the inventory negative even though the organization does not allow negative balances on any other types of transactions.

The only exception is when the component that you are backflushing is under lot, serial, or lot and serial number control. In this case, you will not be able to complete the backflush transaction unless you select a subinventory and locator that contains a sufficient quantity of valid lot and/or serial numbered items.