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Function documentation Dispatching at the Best Time for Setup Locate the document in its SAP Library structure

Use

With automatic dispatching at the best time for setup you can dispatch one or more operations on one of the planning tables in already existing commitments to work centers in such a way that the overall setup time increases as little as possible.

Note

This function is not available for capacity leveling in the process industry (PP-PI), that is, for capacity leveling of process orders and planned orders that refer to master recipes.

Prerequisites

If you do not maintain the setup matrix or if a setup transition is not specified in the setup matrix, then the setup standard value in the operation is used. In the control profile, you specify globally for all operations which standard value is to be treated as the setup standard value.

Activities

Procedure and results of setup time adjustment

With automatic dispatching, the system looks for an optimal point for dispatching one operation after the other to the target work center. Once it finds the optimal time, it dispatches the operation there. If there are several equally good transitions for an operation to be dispatched, then the operation is dispatched at the latest date. The newly dispatched operation retains its original value for the setup standard value, as does its successor. To adjust the setup times of the new commitment, you have to carry out an automatic setup time adjustment.

Dispatching sequence

The operations are dispatched one after the other in the sequence you have specified in the strategy profile. Note that the result of dispatching depends on this sequence.

Forbidden setup transitions

When determining the optimal time, the system takes into account whether the setup transitions are forbidden. If dispatching leads to a forbidden transition, then the operation is not dispatched at this time. If all possible times lead to forbidden transitions, then the operation is dispatched at the end of the capacity commitment even if this transition is forbidden.

Specification of the initial setup state of a work center

A special situation concerning setup time can be when the operation to be dispatched is before the first operation.

If there is no operation before it in the evaluation period, then the setup state of the work center is not defined by an operation.

You can define the initial setup state by entering an Initial setup state in the strategy profile. The setup time of the first operation is calculated using the standard value saved in the setup time matrix for the transition between the initial setup state and the setup state given for the operation. If you do not specify an initial setup state in the strategy profile, the setup time of the operation is calculated using the setup standard value in the operation.

 

 

 

 

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