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What you can do if scheduling does not work or all operations are scheduled with a duration of zero

In the routing, check whether

  • the control key in the operation allows scheduling.

To do this, position the cursor on the control key and press F4. Check if the scheduling indicator in the control key is selected for scheduling. (see Overview: Scheduling a Routing)

  • the scheduling data is maintained for the work center in the operation.

To do this, select the operation and the menu options   Environment   Operation   Work center   . You reach the basic data screen for the work center. Select the menu options   Goto   Scheduling   and check whether a capacity category is maintained as a basis for scheduling. Also check whether formulas are maintained for calculating the execution time. For additional information about work center data, refer to the PP Work Centers guide.

  • the standard values in the work center agree with the standard values maintained in the operation.

  • the scheduling type you set in Customizing allows for scheduling operation dates.

For example, scheduling type "3" specifies for finite scheduling that the operation dates are to be taken from the order header and not scheduled.

  • the control key defines the operation as an operation for rework.

In this case, the indicator Rework is set in the control key. An operation for rework in a routing cannot be scheduled because the rework quantity has not yet been determined. You get a value of "0" for all operation segments in scheduling. Only the operations in orders have dates.

What you can do if scheduling determines a different assembly scrap for various lot sizes of the same material

In this case, a rounding error has occurred when the system calculated the assembly scrap. Remove the rounding error by increasing the value for rounding decimal places in Customizing. To do this, choose the menu options   Global Settings   Check unit of measurement   Units of measurement   in Customizing and increase the value in the Decimal pl. rounding field.