First popularized as an integral part of Total Productive Maintenance (TPM), Overall Equipment Effectiveness (OEE) helps facilities uncover losses and improvement opportunities. OEE, considered a manufacturing best practice, measures how close to perfection the production line is currently running by focusing on three underlying losses:
- Availability = Run Time / Planned Production Time
- Productivity = (Ideal Cycle Time x Total Count) / Run Time
- Quality = Good Count / Total Count
(minutes per part)
How to use the OEE Calculator
- Begin by inputting your parameters in the fields below, beginning with shift times, planned downtime, and unplanned downtime. Add in the number of total parts produced and the ideal cycle time in minutes per part; finally enter in the value for total scrap.
- It's now time to analyze the results -- it is important you are detailed in collecting data in the previous step, so your results are as accurate as possible. OEE is calculated as a percentage and the goal is to be as close to 100% as possible. It is beneficial to set a target score that is viable for your facility to reach in a few months.
- List the causes of unplanned stops and begin there. Look at the percentages for Availability, Quality, and Performance, these numbers will provide insight to the Six Big Losses. It is these losses that will drive your improvement actions.