Factors Affecting Scheduling with PeopleSoft Manufacturing

If you are using PeopleSoft Manufacturing to schedule production, in addition to planned lead times, these factors affect the actual start date and time and the actual due date and time of each operation:

  • Operation overlap, based on a percentage or send ahead quantity.

  • Whether setup can occur during queue time or at any time after production begins.

  • Whether setup time is included in scheduling the operation.

  • Operation intensity.

  • The work center calendar, if one exists.

  • The production calendar, if one exists.

  • The five-day workweek calendar.

Note: If PeopleSoft Supply Planning is installed, you cannot define queue planning lead times. Simultaneous setup and queue is not considered.

You define these factors for each business unit, item, work center, or routing. You can also define these factors when maintaining the operation list if the production is in the Firmed or Released status when an operation list is created.

All production IDs and production schedules maintain production date and shift information as well as actual date and time information.

Production date and shift information is defined as the actual working day and shift (or manufacturing day and shift) during which component and production scheduling can be done. You define production dates and shifts through the production calendar or the work center calendars.

Actual date and time is defined as the actual date and time the production is scheduled to begin or end. In most cases, production dates and actual dates are the same. If you have production shifts that span two days, the actual date for production may be different from the production date. The system determines an actual date by the actual time that a production is scheduled to start or end within the production shift.

You define a production scheduling method when you create a new production ID. When you manually add a production ID, the system schedules it based on whether you know when you want to start production or when the item is due:

  • If you decide to schedule the production ID based on the completion date and time or the due date and time, it is backward scheduled.

    In this case, the system calculates the actual start date and time. The production start date and shift as well as the production due date and shift associated with both the actual start date and time and due date and time are determined.

  • If you decide to schedule the production ID based on the actual start date and time, it is forward scheduled.

    In this case, the system determines when the assemblies will be complete and calculates an actual due date and time. The production start date and shift as well as the production due date and shift associated with both the actual start date and time and due date and time are determined.

PeopleSoft Manufacturing always backward schedules production schedules. When adding a new production schedule, you enter a production due date and production due shift for the production quantity. The system then calculates the production start date and production start shift. The actual start date and time as well as the actual due date and time are also calculated.

When changing the status for a production ID or production schedule to Firmed or Released, the system copies the item's routing and creates an operation list. As the system creates the operation list, it also determines the actual start date and time and actual due date and time for each operation. When the system creates the operations list, it reschedules each operation any time that it's modified.