
FMEA Scales
Abstract
Carl and Fred discuss whether FMEA teams should use the 1–10 Severity, Occurrence, and Detection (SOD) scales in some FMEA Standards, or whether they can tailor the scales to better fit their applications.
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Your Reliability Engineering Professional Development Site
Author of Inside FMEA articles, FMEA Resources page, and multiple books, and a co-host on Speaking of Reliability.
This author's archive lists contributions of articles and episodes.
Carl S. Carlson is a consultant and instructor in the areas of FMEA, reliability program planning and other reliability engineering disciplines, supporting over one hundred clients from a wide cross-section of industries. He has 35 years of experience in reliability testing, engineering, and management positions, including senior consultant with ReliaSoft Corporation, and senior manager for the Advanced Reliability Group at General Motors.
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Carl and Fred discuss whether FMEA teams should use the 1–10 Severity, Occurrence, and Detection (SOD) scales in some FMEA Standards, or whether they can tailor the scales to better fit their applications.
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Humanity is about to be handed almost unimaginable power, and it is deeply unclear whether our social, political, and technological systems possess the maturity to wield it.
Dario Amodei, CEO and co-founder of Anthropic; widely recognized as a leading voice in AI safety
In this article, I’ll share the specific topics that will be addressed in the FMEA and AI series.
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Carl and Fred discuss why organizational culture is not fixed, and how reliability-focused leadership, communication, and sustained engagement can gradually transform the way teams think and operate.
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The best way to predict the future is to create it. Peter Drucker
One of the most consequential topics facing the FMEA community today is how to effectively use Artificial Intelligence (AI) to support FMEA activities. Do it wrong, and the results could be missed opportunities, or potentially catastrophic outcomes. Do it right, and the benefits are immense.
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Carl and Fred discuss why effective reliability planning begins with identifying the gaps between an organization’s current capabilities and its long-term reliability vision.
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Carl and Fred discuss a question from a reader about risk prioritization in FMEA procedure.
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Time is the scarcest resource, and unless it is managed, nothing else can be managed. Peter Drucker
Achieving high-quality FMEAs requires support from the right FMEA team. Getting the team to show up and participate to the fullest extent is critical to success.
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Carl and Fred discuss the ongoing challenge between doing reliability work ourselves and enabling others to accomplish the work. And what is the future human role in the field of reliability, given the advancements in AI?
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None of us is a smart as all of us. – Ken Blanchard
FMEAs have great potential value to improve product designs and manufacturing processes. That value increases significantly when FMEA is properly linked and connected to other analyses.
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Carl and Fred share their experiences and advices about leadership, and why it is essential to accomplishing reliability objectives.
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Carl and Fred discuss the role of writing skills in conveying information to others and influencing the reliability of products and processes.
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“Innovation has a lot to do with timing.” — Steve Jobs
When FMEAs are done is just as important as how they are done. In this article, I’ll share evaluation criteria for the FMEA Quality Objective regarding timing.
FMEAs need to be completed through Recommended Actions, Actions Taken, and risk reduced to an acceptable level by certain dates. Meeting this objective of FMEAs means they were started and completed by the required dates. [Read more…]

Carl and Fred share their experiences in presenting, what they have learned, what is most important in achieving excellent presentations.
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Carl and Fred discuss the role of receiving feedback in improving one’s ability to implement the various reliability tasks and methods. They also cover how to give feedback to others, so it is most meaningful.
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“In the middle of difficulty lies opportunity.” Albert Einstein
There is no more important outcome from an FMEA than identifying and addressing high-risk issues. In this article, I will outline how to evaluate an FMEA against the FMEA Quality Objective for addressing high-risk failures.
The level of risk in an FMEA is identified in the Risk Priority column. For each failure mode and corresponding effect and cause, the FMEA team designates the level of risk, such as “high” or “medium” or “low.” High-risk failures are those that the FMEA teams assigns the highest level of risk, based on appropriate FMEA standard or company policy.
“Address” means “to deal with, handle, or give attention to a problem, issue, or topic in a deliberate and effective way.”
In an FMEA, each of the high-risk failure modes must be addressed by effective actions that reduce risk to an acceptable level. [Read more…]
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