OEE is a Metric used to measure the overall effectiveness of a process. It factors in Availability, Quality, and Performance in the calculation.
- Cycle times must be defined for the OEE metric to calculate. Go to "Production" > "Line Cycle Times" to define cycle times.
- If you are not using the product orders feature, all Cycle Times should be set up using the "All Products" option. If you record a Product on a pitch, it will use the defined Product Cycle Time to calculate OEE.
- You must set up a cycle time for each individual line.
- Active pitch schedules must be populated within the production module to use the OEE calculation.
OEE% = Availability% * Quality% * Performance%
Availability% = (Planned Production Minutes - Downtime Minutes) / Planned Production Minutes * 100
Quality% = Actual / (Actual + Scrap)
Performance% (single pitch §) = Cycle Time / Run Rate
Run Rate = (Planned Production Minutes - Downtime Minutes) / (Actual + Scrap)
Performance% (multiple pitches §) = (Actual + Scrap) / Theoretical Parts
Theoretical Parts = (Planned Production Minutes - Downtime Minutes) * 60 / Cycle Time
§ See the Performance Article for details about the different Performance formulas.
- The Pitch board view within the operator portal is a great way to see your OEE metrics on an hourly basis.
- If your OEE metric is 0, you are probably missing one of the metric variables. Please review the setup above and verify your setup. Specifically, check the Line Cycle Time Settings for the line. OEE is highly dependent on having the Line Cycle Time set up.
- If a line is running at a faster rate than the cycle time, the Performance metric will be greater than 100%. This will cause the OEE metric to also inflate. If you are using the OEE metric, we encourage you to monitor Performance numbers and regularly audit cycle times.
- Downtime is calculated using data from "Down" Dispatches. Read more about Impact in our Dispatch Type Detail article.
- If you are scheduling non-production minutes inactive pitches, and a machine is down for the entire duration of the pitch, we will calculate downtime for the entire duration of the pitch, not just production time. This is because you can't indicate where during the pitch the non-production minutes will lie. If you don't want to include downtime for non-production minutes, break your pitches up into production pitches and non-production pitches, and inactivate the non-production pitches.
- The Dashboard view re-calculates the numbers using the raw data. This ensures a more precise result.
Pro-Tip: If your OEE Pareto Report results do not match exactly your OEE Trend Report results
The OEE Pareto Report uses the precision value from the OEE metric for all of the values displayed. Some customers have this metric set to ' .1 '.
The OEE Trend Report uses the precision value for each metric individually and as specified by the customer in the Production Settings. The default value for precision is whole numbers only, which is what the OA calculation uses. That is why there is sometimes a difference in the reported results.