Fixed Lead Time

When an item on a work order has a fixed lead time, the system determines the start date by using the level lead time to backschedule.

For example, assume:

• Work order due date = October 15.

• Level lead time = 3 days.

  Note: The shop floor calendar determines which days are considered work days.

The system has a start date of October 12. The system then calculates the start date for the work order by subtracting the level lead time or lead time per unit, depending on the fixed or variable lead time option, from the required date. The system displays an error message if either of these conditions occurs:

• The start date differs from the date of the first operation sequence on the routing instructions for the item.

• The operation sequence dates could not be calculated using backscheduling.

  Note: The system schedules work orders to be completed by the end of the day on the day before the work order is due.