Jump to content

Calculation of OEE based on MTTR, MTTF, MTBF

Recommended Posts

Is there any method to calculate OEE (Overall Equipment Effectiveness) based on the data from MTTR (Mean time to repair), MTTF (Mean time to Failure) , MTBF (Mean Time between Failure) in equipment used in non manufacturing utility industries.

Share this post

Link to post
Share on other sites

Hi Ransingh,


Overall Equipment Effectiveness which is the product of Availability, Performance and Quality can't be obtained via MTTR, MTBF and MTTF for the equipment. 


This is so because the three measures do not relate to Performance or Quality. 


If you know MTBF and MTTR, you should be able to calculate availability losses that are due to unplanned stoppage due to machine failure. However planned stoppages (like change over time) which are part of availability calculation in OEE will still be hidden. Also, unplanned stoppage due to other reasons like power failure (MTBF may not consider power failure as equipment failure based on a common definition which considers only equipment malfunction as failure) will also be hidden. 


To answer your question, OEE cannot be inferred from those numbers. OEE, for utilities, as a metric, may not be a great measure of performance but that is a different topic to discuss. 

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now