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In addition to the floats before and after production, you can define an operation float in the form of a queue time . The queue time is used to compensate for malfunctions and delays within an operation.

The queue time is the interval between the earliest and latest dates of the operation (see the following figure). During each scheduling run, the system calculates the earliest and the latest dates for the individual operation segments.

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You can maintain the queue time in both the work center and operation. However, the system only schedules with the queue time in the work center if you have not maintained the queue time in the operation. If the lead time of an operation must be reduced, the system can shorten the standard queue time as far as the minimum queue time.