Optimization of Setup Times and Setup Costs 

Use

You can use optimization to optimize the use of single resources by reducing the total setup times and costs. The system determines setup times and setup costs that are dependent on sequence from the setup matrix.

Prerequisites

·        You have modeled the single resources and the operations that are processed at these resources in exactly the same way as for the setup time adjustment.

·        You have weighted the setup times or the setup costs in the objective function.

Features

In the objective function, the system interprets the values for the setup times and setup costs from the setup matrix as follows:

·        You enter the setup time in a unit of your choice (for example, hours or minutes) in the setup matrix. In the objective function, the system uses the setup time in seconds. For example, if you enter a setup time of 10 minutes in the setup matrix, the system uses the value of 600 (seconds) in the objective function.

·        You enter the setup costs without unit of measurement in the setup matrix. In the objective function, the system uses the value entered in the setup matrix. If you enter, for example, setup costs with a value of 10 in the setup matrix, the system uses the value of 10 (seconds) in the objective function.

In the objective function, the setup costs with a value of 10 correspond to a setup time of 10 seconds. You must take this relationship between setup times and setup costs into account when defining the objective function, that is, when specifying the weighting for the setup times and the setup costs.

Optimization displays the net duration of deallocated setup activities in the objective function as the setup time. The net duration of a deallocated setup activity is sequence-independent. Deallocated setup activities do not cause any setup costs.