Backflushing

Reducing unnecessary effort is an important JIT function.  One way the JIT module does this is by reducing inventory transaction recording through backflushing, or simultaneous issue and receipt (SIR).  Instead of recording both parent receipt and component issue transactions when a completed part is received from the floor, the JIT module records only a single SIR transaction.

When a completed JIT part is received from its production center, its components are determined and automatically issued from a defaulted shop floor or warehouse location.  The parent part is automatically received into a previously determined location.

When a JIT part is scrapped during production, some of its components may still be usable.  Those components are used to build a new parent, and are backflushed when that parent is received into inventory.  However, the non-usable components of the scrapped parent are never received and therefore never backflushed.  They must be issued from inventory through a specific transaction called unplanned usage.

Lot-controlled and deduct components are not backflushed, because a specific transaction is used to issue them.