OEE Parameters Calculation for Time-Based Units
The time-based approach to the OEE calculation measures the performance and quality losses in terms of loss of production time or downtimes that are attributed to the performance and quality, respectively.
The OEE parameters Availability, Performance, and Quality for the time-based units are calculated based on the formula described in the following table.
OEE Parameter | Calculation Formula |
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Availability | Availability = Net availability run time/Planned production time Where, Net availability run time = Planned production time - Availability downtime |
Performance | Performance = Net performance run time/Net production time Where,
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Quality | Quality = Net quality run time/Net production time Where,
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Time-Based OEE Parameters Calculation
In this example, the value for the production time and downtime for each OEE parameter is as shown in the following table.
Inputs | Value |
---|---|
Planned production time | 60 minutes |
Availability downtime | 10 minutes |
Performance downtime | 10 minutes |
Quality downtime | 10 minutes |
The following table provides the value of each OEE parameter calculated based on the formula described in the earlier section.
OEE parameter | Parameter value | Formula used | Explanation |
---|---|---|---|
Availability | 50/60 = 0.8333 | Availability = Net availability run time/Planned production time. | Planned production time = 60 minutes Availability downtime = 10 minutes Net availability run time = 60 - 10 = 50 minutes |
Performance | 40/50 = 0.8 | Performance = Net performance run time/Net production time | Planned production time = 60 minutes Availability downtime = 10 minutes Performance downtime = 10 minutes Net performance run time = 50 - 10 = 40 minutes Net production time = 60 - 10 = 50 |
Quality | 30/40 = 0.75 | Quality = Net quality run time/Net production time | Planned production time = 60 minutes Availability downtime = 10 minutes Performance downtime = 10 minutes Quality downtime = 10 minutes Net quality run time = 50 - 10 = 40 minutes Net production time = 60 - 10 - 10 = 40 minutes |