Labor and Setup Costs for Die Casting
Most casting processes use the formulas in this section to determine labor and setup costs.
Die Casting and moldmaking processes use the a special labor cost formula that includes handling cost:
Labor Cost = Labor Time * Labor Rate / Final Yield
Labor cost depends on the following:
• Labor time (see formula below)
• Labor rate (specified as a machine property)
Labor Time = (Cycle Time * Number of Operators * Labor Time Standard) + Labor Handling Time
Labor time depends on the following:
• Cycle time (see process-specific Cycle Time formulas)
• Number of operators (specified as a machine property)
• Labor time standard: specified as the machine property Labor Time Standard. This multiplier is used to account for otherwise unaccounted for factors that affect labor time, such as operator fatigue or time spent by the operator for cleaning or maintenance.
• Labor handling time (see formula)
Labor Handling Time = Elapsed Handling Time * Number of Handling Operators
Elapsed handling time and number of handling operators are interpolated from values looked up by mass in the lookup table
tblHandlingTimes. Labor handling time is 0 for the Melting process. For all casting processes except coremaking processes, the mass that requires handling is Mass Before Machining (
Material Cost and Utilization for Die Casting).
The interpolated value is based on the table rows whose Max Weight values straddle the mass that must be handled. If the mass falls below the minimum mass listed in the table, the handling time is considered negligible, and is set to 0. If the mass exceeds the maximum mass listed in the table, aPriori uses the values in the row with the maximum mass.
Amortized Batch Setup =
(Setup Time * (Labor Rate + Direct Overhead Rate)) / Batch Size
Batch setup cost per part depends on the following:
• Setup time (specified as the machine property Setup Time)
• Labor rate (specified by the machine property Labor Rate)
• Direct overhead rate (see
Direct and Indirect Overhead)
• Batch size (specified in the Production Scenario screen of the Cost Guide)