The durations of the operations/activities or the time intervals of the relationships are distributed for scheduling over a time axis. Every element of scheduling (operation/activity or relationship) can have its own duration and operating time.

The operating time specifies when work takes place. The calendar used specifies the workdays and the public holidays. In the work center you specify the operating time per workday, based on start time, finish time andbreaks.

The valid operating time is the one defined for the capacity category that is shown on the screen Scheduling in the work center. If no operating time per work day is defined then the system uses an operating time from 00.00 to 24.00 as a default.

The following rules apply:

• If the time unit of the duration is smaller than the unit "day", the operating time per workday is used.

• If the time unit of the duration is greater than or equal to the unit "day", scheduling to the day is carried out on the basis of the valid calendar.

The system uses the calendar from the work center. If a calendar is not defined in the work center, the system uses the calendar in the operation/activity or in the relationship. If no calendar is specified there either, then the system uses the Gregorian calendar.