Issue Code

Defines the material issue method for a part.  Valid codes are:

R - Requisition

S - Simultaneous Issue and Receipt ("Backflush")

T - JIT Multi-Level Backflushing 

If 'S' is defined for a part, Inventory Control will automatically record a material issue for the part when a receipt is entered against a manufacturing order for which the part is a component.  If 'R' is defined, you must record each issue of material with a separate transaction.  The Simultaneous Issue and Receipt feature is useful for high-volume, low-cost items such as nuts, bolts, and screws.  Lot-controlled parts may not have an issue code of 'S'.  

If 'T' is defined for a JIT part, Just-in-Time will automatically record a flow receipt or a stock transfer (depending on its part type) for this part when a flow receipt or a manufacturing order receipt is entered against its parent.  The multi-level backflushing feature is useful for high-volume, low-cost items that have no work-in-process (WIP) inventory.  Parts with an issue code of 'T' cannot be lot controlled or deduct components.