In SAP Plant Maintenance, when a Maintenance Plan is created, the cycle is assigned and defines the interval for the call dates and thus for the creation of orders.
In addition, different scheduling parameters can be assigned in order to adapt the call dates to various requirements.
– The Cycle Start determines the date from which call dates are to be calculated.
– The Shift Factor enables you to react to early or late confirmation. They are stated as a percentage related to the cycle.
Call Dates are calculated on the basis of scheduling parameters. For each call date, an order is created.
The changes in the schedules will vary depending on what you declare on the Early/Late Shift Factors and in the Tolerance Level of your Maintenance Plan.
A Maintenance Plan shows the shift of a planned date triggered by a late confirmation. The following parameters are taken as a basis:
– Cycle start: 01/03/98 – Cycle duration: 3 months
– Planned dates: 01/06/98, 01/09/98 – Tolerance for late confirmation: 10%
– Shift factor: 50% – Confirmation: 15/06/98
The tolerance always refers to the shortest cycle, so that in this case the tolerance is 9 days (10% of 90 days). The shift factor always refers to the total number of late days. As the confirmation date is outside the tolerance of 9 days, the shift factor of 50% of 14 days = 7 days applies. The newly derived planned date is therefore the 08/09/98 (instead of the 01/09/98).