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	Simulation Results Explorer

System Costs

The System Costs worksheet in the Simulation Results Explorer displays the costs that accrued during the simulation time.

For each of the four classes of tasks (i.e., corrective, preventive, on condition and inspection), the following information is presented with regard to costs that accrued during the simulation time:

Misc. Costs: The miscellaneous costs associated with the task class. This is based on the cost per task and downtime rate, specified in the Maintenance Task window.
Costs for Parts: The cost for spare parts due to tasks of this class. This is based on the direct cost per item as specified in the Spare Part Pool window, as well as any indirect costs (e.g., holding costs, costs associated with restocking, etc.). Note that this value is not available for inspection tasks, as inspections do not use spare parts.
Costs for Crews: The cost for crews due to tasks of this class. This is based on the direct cost per unit time and cost per incident, as specified in the Crew window.
Total Costs: The total cost for maintenance of this type, based on the miscellaneous costs and costs for spare parts and crews.

In addition, the following costs are calculated:

Downtime Costs: The costs associated with downtime that accrued during the simulation time. This is the sum of all of the block downtime costs (i.e., for each block, its downtime multiplied by its downtime rate, and its number of failures multiplied by its cost per failure).
Indirect Pool Costs: The indirect costs of maintaining the spare part in the pool over time. For example, if it costs $20 per month to keep the part available in the pool and the part remains in the pool for 3 months, then $60 of indirect costs have accumulated for the item.
Total Costs: The total cost that accrued during the system simulation time, based on all of the costs shown in the worksheet.