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Operation Types
Operation Types
The operation type is defined for each operation in the Manufacturing Engineering module. This determines the method by which the operation is scheduled, and by which start and due dates are assigned. Each operation type has specific requirements for the various elements of the lead time defined above. The definitions and requirements of each operation type are summarized in Figure 1. An illustration of how successive operations are scheduled for each operation type is provided in Figure 2, 3, and 4.
· Operation Type 1 - Standard. This operation type requires all components to be available from the preceding operation before setup can begin.
· Operation Type 2 - Master Operation. This type of operation is not itself scheduled. Master operations are used to summarize two or more detail records for reporting purposes only. The start and due dates are determined by scheduling all details associated with the master.
· Operation Type 3 - Setup Only Overlap. This denotes an operation that does not require any components to be available for setup. However, all components must be available before the run can begin.
· Operation Type 4 - Run Time Overlap. This operation type is an overlapping operation that may begin the run prior to completion of the preceding operation. Components from the preceding operation are not required for setup. The user specifies the quantity or percentage of the order quantity that must be available from the previous operation before the run can begin.
· Operation Type 5 - Setup and Run Time Overlap. This requires some but not all components from the preceding operation before commencing setup and run. As long as the overlap quantity/overlap percent requirement is met, both setup and run time may overlap. The user specifies the quantity or percentage of the order quantity that must be available form the preceding operation before setup and run can begin.
· Operation Types 6 and 7 (Not Sensitive) - Fixed Time Operations. The run time for these types of operations is considered to be independent of the order quantity. The system assumes that the entire order quantity must be available before starting the operation, and that the entire order quantity is available when the fixed time operation ends. Move or queue time can be associated with both types of operations. The difference between the two is that type 6 operations require the components from the previous operation before setup can begin. For type 7 operations, setup is assumed to be independent of receiving components from the prior operation.
· Operation Types 6 and 7 (Sensitive) - Fixed Time Operations. The run time is in terms of batches. The total number of batches is determined before the time is determined. The number of batches calculation is (ORDER QTY - (SENSITIVITY FACTOR x BATCH QTY))/BATCH QTY resulting in a total time of NUMBER OF BATCHES x RATE.
· Operation Type 8 - Just-in-Time Operations. Just-in-time operations are used on routings for parts with production type of JIT. All operations on a JIT routing are assigned an operation type of 8 automatically. You cannot specify an operation type of 8 on a routing for an MRP part. JIT scheduling and load calculation is described in the Just-in-Time Routings key concept.
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