One of the many capabilities of Dream Report is its ability to take raw process and equipment data, and present it in the specific context of a problem that needs to be solved. In the case of Overall Equipment Performance (OEE) reporting, Dream Report can utilize raw machine state data (Running/Not Running, or simply, 0’s and 1’s) to calculate machine availability, and hence OEE, over any defined/planned production time period.
OEE % = Availability * Performance * Quality
When configuring an OEE report in Dream Report, the following approach is recommended:
- Connect to a data source(s) that contain machine data – e.g., a process Historian, PLC or HMI
- If the machine data is not already logged in a historian or other data logger, use Dream Report’s data logging feature to record the data
- Use Dream Report’s built-in “Availability” statistical function to calculate availability – (Net Operating Time/Net available Time)*100%. This is calculated by simply referencing a machine “status” bit, and setting a time period, and Dream Report performs the calculation. You can also apply a “filter” to the raw data to only calculate Availability under certain conditions – e.g., only calculate when the line speed exceeds a minimum value.
- Use a Dream Report “Expression” object to calculate Performance %. The “Ideal Operating Time” component for Performance might be available as a database lookup, a setpoint parameter on the HMI Or PLC, or manually entered by the operator (which is possible in Dream Report through a simple web form on the Dream Report Web Portal.)
- Use a Dream Report “Expression” object to calculate Quality %. It is common practice to assume 100% quality, but this number could be calculated from electronically-available data, or manually entered.
- With the three OEE component values calculated, the OEE will be calculated in any object in Dream Report. The resulting value can be shown as a single numeric value on a report; as a graphical display (e.g., an OEE gauge or indicator with color-coded OEE “breakpoints”); or in tabular format (e.g., a table showing OEE by shift for the current day.)
- Lay out the report as needed
Reports can be automatically generated on a schedule (e.g., at the end of each shift), on-demand, periodically updated on a web portal (e.g., have an OEE web report constantly displayed, and set to auto-refresh every 10 minutes) or even triggered (and emailed) under certain conditions (e.g., when the calculated OEE drops below a specific value).
The following are a few OEE and availability reports. Remember, in Dream Report, you can configure and layout a report in any format, as needed.