1. Shop Floor Management Implementation Guide
  2. Understanding Work Order Backscheduling

Understanding Work Order Backscheduling

To meet the Material Requirements Plan (MRP) required date for an order, JD Edwards EnterpriseOne Shop Floor Management assigns a completion date for the routing instructions that is one day before the Master Production Schedule (MPS) or MRP required date. Then, the system assigns the start and requested dates to each operation in the routing instructions for the work order or rate schedule. Assigning the start and requested dates for each operation is called backscheduling.

Backscheduling ensures that the material is out of production and available on the required date. For example, a work order completion date of February 15 for routing instructions ensures that the items produced will be out of production and available for shipping or sale on the MRP required date of February 16.

After you have defined the work order routing instructions, the system performs these actions:

  • Retrieves the resource units for the work center of each operation.

  • Consumes the hours (queue, run, and then move hours) using the calculations for either fixed or variable lead time.

  • Scales the work center's remaining units proportionate to the previous operation's remaining units.

    For example, if 25 percent of the previous work center's units remain available, the current work center's units available to schedule for the same day will equal 25 percent of its daily total. This calculation assumes that all work centers have consumed 50 percent of available units by the middle of the calendar workday.