Manufacturing Lead Time
The manufacturing lead time for an item is the sum of its operation lead times, stated in manufacturing days. Capacity planning uses manufacturing lead time, in conjunction with the work center or shop calendar, to determine order release dates.
There may be differences between operation schedules for an order and the manufacturing lead time for an item due to any one of several reasons:
• The item order quantity used to calculate the manufacturing lead time may be different than the actual order quantity for an operation, resulting in differences in the run time for an operation.
• The shop and/or work center calendars may be scheduled for more (or less) hours than the default calendars used to calculate manufacturing lead time.
• Queue time for the first operation does not affect its start date; therefore, it may fall after the release date of an order.
• Two successive operations may overlap.