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No MTBF Blog

A site devoted to the eradication of MTBF. The following excepts are recent posts of the

NoMTBF blog. Click through or visit nomtbf.com to learn more about the perils and what you can do instead of using MTBF.

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  • Lifetime Evaluation vs. Measurement. Part 4 – Quantitative HALT
    Give me a place to stand on, and I will move the Earth. Archimedes Its known HALT is an effective way to find the weaknesses in your product during the reliability improvement program. In doing so, we …
  • MTBF of a Human
    “What’s the MTBF of a Human?” That’s a bit of a strange question? Guest post by Adam Bahret I ask this question in my Reliability 101 course. Why ask such a weird question? I’ll tell you why. Because …
  • MTBF Paradox: Case Study
    MTBF Paradox: Case Study Guest Post by Msc Teofilo Cortizo The MTBF calculation is widely used to evaluate the reliability of parts and equipment, in the industry is usually defined as one of the key …
  • A Novel Reason to Use MTBF
    A Novel Reason to Use MTBF Thanks to a reader that noticed my question on why MTBF came into existence, we have a new (new to me at least) rationale for using MTBF. Basically, MTBF provides clarity on …
  • What is the MTBF Means?
    What is the MTBF Means? Guest post by Msc Teofilo Cortizo The term MTBF (Mean Time Between Failures) within maintenance management, it is the most important KPI after Physical Availability. Unlike MTT …
  • Consider the Decision Making First
    Consider the Decision Making First Reliability activities serve one purpose, to support better decision making. That is all it does. Reliability work may reveal design weaknesses, which we can decide …
  • What is Wrong With Success Testing?
    What is Wrong With Success Testing? Three prototypes survive the gauntlet of stresses and none fail. That is great news, or is it? No failure testing is what I call success testing. We often want to c …
  • Defining a Product Life Time
    An Elusive Product Life Time Definition The following note and question appear in my email the other day. I had given the definition of reliability quite a bit of thought, yet have not really thought …
  • MTBF is Not a Duration
    MTBF is Not a Duration Despite standing for the time between failures, MTBF does not represent a duration. Despite having units of hours (months, cycles, etc.) is it not a duration related metric. Thi …
  • The Fear of Reliability
    The Fear of Reliability MTBF is a symptom of a bigger problem. It is possibly a lack of interest in reliability. Which I doubt is the case. Or it is a bit of fear of reliability. Many shy away from th …
  • Being In The Flat Part of the Curve
    What Does Being In The Flat Part of the Curve Mean? To mean it means very little, as it rarely occurs. Products fail for a wide range of reasons and each failure follows it’s own path to failure. As y …
  • A Series of Unfortunate MTBF Assumptions
    A Series of Unfortunate MTBF Assumptions The calculation of MTBF results in a larger number if we make a series of MTBF assumptions. We just need more time in the operating hours and fewer failures in …
  • Time to Update the Reliability Metric Book
    It is Time to Update the Reliability Metric Book with Your Help Let’s think of this as a crowdsourced project. The first version of this book is a compilation of NoMTBF.com articles. It lays out why w …
  • We Need to Try Harder to Avoid MTBF
    We Need to Try Harder to Avoid MTBF Just back from the Reliability and Maintainability Symposium and not happy. While there are signs, a proudly worn button, regular mentions of progress and support, …
  • 3 Ways to Expose MTBF Problems
    3 Ways to Expose MTBF Problems MTBF use and thinking is still rampant. It affects how our peers and colleagues approach solving problems. There is a full range of problems that come from using MTBF, y …
If you’d like to learn more about MTBF and how to improve your reliability metrics, let’s talk.

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