Diagnosis
In the planning table for repetitive manufacturing, you are workingwith midpoint scheduling based on the "planning operation" (presumingyou are using the production dates view).
The planning operation is the operation that takes place at the workcenter that has been entered in the production as the production line.
If this production line is a line hierarchy, the planning operationrefers to the planning section that has been entered there (schedulingwork center in Release 4.0A/B). The planning version then defines the"bottleneck work center", as does the line of the production versionusually.
In order to carry out midpoint scheduling with reference to aparticular "bottleneck work center", there has to be an operation,which is relevant to scheduling, that is processed at this work center.

System Response
If the system cannot find an operation, which is relevant toscheduling, at the "bottleneck work center", it executes backwardscheduling. The production quantity for the basic finish date, whichwas determined, appears on the planning table. This can mean that thequantity "jumps" several cells after entry.

Procedure
Select a work center of an operation that is relevant to scheduling,and enter it in the production version in the material master. If aline hierarchy is in use, define the work center as the planningsection in the line hierarchy (scheduling work center in Release4.0A/B).