Operational Availability (OA) measures how long a 'system' has been available to use compared with how long it should have been available.
You will find the OA metric on the Operator Portal, Production Dashboards, and in many Reports.
In this article, LMPU means Labor Minutes Per Unit, Dispatch Type means the event category used to classify downtime or other events, Down impact means a dispatch that counts toward downtime and availability calculations, and the Production module means the production tracking area of the system where pitch schedules and production metrics are managed.
Calculation
Operational Availability (OA) = (Planned Production Minutes - Production Downtime Minutes - Planned Downtime Minutes) / Planned Production Minutes × 100
- Only downtime from dispatches with Down impact is included in OA downtime calculations. Planned downtime is subtracted only when the dispatch type is configured with Planned Downtime: Exclude from Availability Production Metric. This setting is intended for dispatch types that are not marked as Down impact. If the toggle(s) are not activated, the Planned Downtime defaults to 0, keeping the calculations for both metrics the same as before the release.
Example for a single pitch:
If Planned Production Minutes = 480, Production Downtime Minutes = 45, and Planned Downtime Minutes = 30, then OA = (480 - 45 - 30) / 480 × 100.
OA = 405 / 480 × 100 = 84.375%.
In this example, the OA for the pitch is 84.38%.
Calculation for multiple pitches:
Operational Availability (OA) = (sum(Planned Production Minutes) - sum(Production Downtime Minutes) - sum(Planned Downtime Minutes)) / sum(Planned Production Minutes) × 100
Example for multiple pitches:
If two pitches have Planned Production Minutes of 240 and 240, Production Downtime Minutes of 20 and 25, and Planned Downtime Minutes of 10 and 15, then OA = ((240 + 240) - (20 + 25) - (10 + 15)) / (240 + 240) × 100.
OA = (480 - 45 - 25) / 480 × 100 = 410 / 480 × 100 = 85.42%.
Calculation if you are not using the Production module:
Operational Availability (OA) = ((Number of Machines × Available Shift Minutes) - Downtime Minutes) / (Number of Machines × Available Shift Minutes) × 100
Number of Machines is based on the count of unique machines found in dispatches with Down impact in the selected time frame and area.
Notes:
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We do not display Production Downtime Minutes on the Operator Portal or the Production Pitch Boards. Production Downtime Minutes is displayed on the Weekly Production Summary report.
Prorating
This metric will be prorated in certain areas of the application. For details on how OA values are adjusted in prorated contexts, see the article on Prorated Production Metrics.
Related Links
- OEE Metric
- For details on Labor Minutes Per Unit, see the Labor Minutes Per Unit Metric (LMPU).