The table MTL_TXN_REQUEST_LINES stores all of the move order lines. The lines are requests to move some quantity of an item from a source location to a destination location or account. Each move order line must be tied to a specific move order header.

When a line is detailed or pick released, the quantity detailed is updated appropriately and transaction lines are created in MTL_MATERIAL_TRANSACTIONS_TEMP. When the transaction lines are transacted, the quantity delivered is updated.