The SyteLine Scheduler and APS calculate the duration of an operation consideringsetup time, run time, move time, and finish time. Run time is the processing step of the operation.
NOTE: MRP considers operation run time indirectly through the lead time calculations from the Lead Time Processor.
An operation's run time begins after these events:
The operation may require resources from Labor, Machine, and Other (for example, fixtures) resource groups. If an operation specifies multiple resource groups that are of different types, the operation must specify the Schedule Driver. The Schedule Driver determines whether to use labor hours or machine hours to drive the schedule. If the resource groups are all of the same type, the run hours for all the required resource groups drive the plan and schedule.
To determine how to plan or schedule the operation, the system:
If the operation's Use Fixed Schedule option is selected, the system applies the Fixed Sched Hours and does not divide the hours by the number of resources.
Costing considers the run hours for all labor resource groups and adds the fixed machine overhead cost. The hours entered on the job operation are the total hours required for 1 piece.
Suppose an operation specifies the following information:
Resource Group | Group Type | Qty Resources | Hours Per Piece |
---|---|---|---|
WorkersA | Labor | 2 | 1 labor hour |
Drill | Machine | 1 | 2 mach hours |
FixtureA | Other | 1 | (2 mach hours) |
Given this information, the system performs these steps:
The system applies 3.75 hours of run time to each of the two Labor resources, the Machine resource, and the Other resource for this operation. When the operation is planned or scheduled, the four resources also undergo any move time, setup time (also adjusted for Efficiency), and finish time.
Using the data from the planning and scheduling example above, suppose the operation's Labor Run Rate is 15.00 and the Fixed Machine Overhead rate is 10.00. The cost of the operation would be calculated as follows:
1 labor hour per piece * 6 pieces * 15.00 * (100 / 80.0) + 10.00 = 122.50
Adding or removing resources/resource groups to or from an operation does not affect the operation's cost.
About Infinite Resource Capacity