Quick Answer
Calculate Spare Parts Criticality Index Calculator
Calculator
Result Interpretation
Spare Parts Criticality Index Calculator computes Spare Parts Criticality Index in dimensionless using the defined engineering formula and the input values provided.
Worked Example
Verified calculation
Given:
- Safety Stock Days = 5
- Failure Impact Score = 8
- Downtime Cost per Hour = 2500
- Part Availability Factor = 0.92
- Mean Time to Repair = 6
Expected Result:
- Spare Parts Criticality Index = 26086.956521739
Engineering Interpretation:
Under the given input conditions, the calculated result is: Spare Parts Criticality Index = 26086.956521739 dimensionless.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
spare parts criticality index = (failure impact score * downtime cost per hour * mean time to repair) / (part availability factor * safety stock days)Formula family: formula_maintenance_spare_parts_criticality_index_calculator
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| failure_impact_score | Failure Impact Score | INPUT | Failure Impact Score |
| downtime_cost_per_hour | Downtime Cost per Hour | INPUT | Downtime Cost per Hour |
| mean_time_to_repair_hours | Mean Time to Repair | INPUT | Mean Time to Repair |
| part_availability_factor | Part Availability Factor | INPUT | Part Availability Factor |
| safety_stock_days | Safety Stock Days | INPUT | Safety Stock Days |
| spare_parts_criticality_index | Spare Parts Criticality Index | OUTPUT | Spare Parts Criticality Index |
Calculation Steps
- Enter the failure impact score in dimensionless.
- Enter the downtime cost per hour in USD/hour.
- Enter the mean time to repair in hour.
- Enter the part availability factor in dimensionless.
- Enter the safety stock days in day.
- Step 1: Compute spare parts criticality index.
- Read the spare parts criticality index (dimensionless) from the results.
Engineering Summary
Calculate Spare Parts Criticality Index Calculator
Frequently Asked Questions
What does this calculator calculate?
The Spare Parts Criticality Index Calculator estimates Spare Parts Criticality Index based on the input parameters you provide
Why is failure impact score important in this calculation?
failure impact score is directly proportional to spare parts criticality index. When you enter failure impact score in dimensionless, the calculator uses it in the engineering formula to compute the output
How should I interpret the result spare parts criticality index?
The calculator outputs spare parts criticality index in dimensionless. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Failure Impact Score (dimensionless), Downtime Cost per Hour (USD/hour), Mean Time to Repair (hour), Part Availability Factor (dimensionless), Safety Stock Days (day). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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