Use this preventive maintenance yield loss calculator to turn routine preventive maintenance records into a clear operating measure. Enter the time, workload, and performance values from one consistent period. The result includes the headline metric plus supporting figures that make bottlenecks, capacity gaps, or avoidable losses easier to discuss before changing staffing or schedules.
The headline result summarizes preventive maintenance yield for the values entered. Read it alongside the supporting measures, because a change in workload, staffing, delay, or quality can move the result for very different reasons.
This is an operational estimate. Keep definitions and time boundaries consistent when comparing teams, assets, or periods.
For 1,000 processed units with 35 rejected units valued at $18 each over 8 hours, yield loss is 3.5%, first-pass yield is 96.5%, and estimated loss is $630 or $78.75 per hour.
Use one consistent shift, day, week, or planning window. Do not mix output from one period with time or staffing from another.
Yes where the field allows zero. The calculator will show a zero-rate result without displaying undefined or infinite values.
Use net available or planned time as described by each field. Record unplanned stops separately when the calculator requests downtime.
Enter the average number actively available during the measured period. If staffing changes materially, calculate each segment separately.
Dashboards may use different time boundaries, exclusions, rounding, or definitions. Match those rules before comparing the numbers.
| Input | How it is used |
|---|---|
| Total units | Use a verified value from the same measurement period. |
| Rejected units | Use a verified value from the same measurement period. |
| Value per lost unit | Use a verified value from the same measurement period. |
| Period hours | Use a verified value from the same measurement period. |