A  Once the parts have been pulled to the kit and the kit status is changed to "Kit in Process" MRP is designed to calculate from the Kit Shortage and production lead time NOT from the production offset lead times. Once the parts have been pulled to the kit, the system is assuming that the shortages are needed by the WO due date, rather than the Production offset lead time, so MRP then calculates using the production lead time and due date of the WO as the date the materials must be on hand, MRP no longer takes the production offset lead time into consideration