The priority of the operation. Priority is used to control simultaneous operations. Simultaneous operations are characterized ...

The priority of the operation. Priority is used to control simultaneous operations. Simultaneous operations are characterized by the fact that they appropriate several operations resources at the same time, for example, a machine and a tool. This is accomplished by giving the same Oper. No. value to all operations that are to be executed at the same time. The priority determines which operation is the primary one. The primary operation should be the operation loading the operations resource that is regarded as the bottleneck for simultaneous operations. A bottleneck operations resource is not defined in any special way in the system, because individual routes and productions determine which operations resources form the bottleneck. Therefore, an operations resource regarded as a bottleneck on one route, and therefore defined as primary for simultaneous operations on that route, can be secondary on another route. If the operation is not primary, the times from the primary operation are used to schedule the secondary operation. Thus times do not have to be specified for secondary operations. If there are no parallel operations for an operation number, the operation will be created that has a primary priority.
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