Many have commented on the various catagories that could be used to define "bad actor". I don't know of an industry standard for the term. It is similar to me to criticality models where each business or plant may have specific/custom elements that are important and critical to defining "bad actor". Those elements some have already mentioned are environmental, # failures in 12 months, cost of failures, # of repair WOs, # failures which caused machine downtime, any repeat failure in 12 months, etc.
I've used # of repair WOs over a certain dollar amount in 12 months in the past to serve as an indicator of "bad actor". This is good because you can mine your CMMS and get your listing of assets and repeat WOs.
One other element that your reliability engineers and maintenance professionals can help with on bad actor lists is understanding what the failure mode is for each failure or repair. In some cases it doesn't matter but in some it can. You will need that information anyway when the bad actor assets gets to a problem solving phase.
Two other tips on bad actor lists. Don't discount feedback from maintenance techs and operators. A WO scrub may or may not show all bad actors due to documentation errors, etc.
Also vibration or other predictive maintenance history is another good source of identifying bad actors. A machine may always have very high vibration and not fail in 12 months but fails in 15-18 months when it should last 5-10 years. This too is a bad actor but only shows up in some predictive maintenance data for the asset.
Good topic with a lot of potential.
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Randy Riddell, CMRP, PSAP, CLS
Reliability Manager
Essity
Cherokee AL
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Original Message:
Sent: 01-17-2023 11:37 AM
From: Thomas Williams
Subject: Bad Actor Calculation
Hello- we are standardizing the definition of Bad Actor related to unreliable assets, and developing metrics to calculate what a Bad Actor is. Does anyone have an effective definition of Bad Actor (what constitutes a Bad Actor)? Thank You.
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Thomas Williams
Principal Reliability Engineer
Sanofi Pasteur
Somerset MA
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