What To Do When A Customer Requests MTBF
You have carefully crafted a detailed reliability goal including function, environment, probability, and duration, plus apportioned it to critical supplied subsystems and components. Your vendor decides to use MTBF instead.
What can you do? What should you do?
The supplier is critical to the success of the project. The design team wants to work with this supplier, and there are few viable alternatives. What can you do?
Let’s discuss this and similar situations and outline steps you can take to prevent this from occurring to start. What specific steps can you take to help your supplier use your stated reliability goal and not MTBF?
If you have experienced this situation, let me know, and let’s talk about both the impact and how you achieved the desired supplied part reliability. We all face this situation, so let’s share what we have found to work to achieve our overall project goals.
This Accendo Reliability webinar originally broadcast on 8 November 2016.
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To view the recorded webinar and slides, visit the webinar page.
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The Reliability Metric: A Quick and Valuable Improvement Over MTBF book
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The Business of Providing MTBF article
Voicing concern about MTBF article
Exploring Alternatives to MTBF
You may already know my position on MTBF. If not, in short, do not use MTBF at all, ever, in any form. So what should we use instead.
What To Do When A Customer Requests MTBF
what specific steps you can take to help your customer actually use your the stated reliability goal and not MTBF.
What You Need to Know About MTBF
No time to understand MTBF, and your organization relies on the reliability of its products, you are almost certainly in trouble.
What to Do About MTBF Use
The proper and improver responses to someone asking about or requesting MTBF information. Some to avoid and some to use regularly.
How Do I Do MTBF Testing?
If you want to learn more about MTBF testing and how it might (or might not) work … then view this recording.
Why You Should Avoid MTBF
This morning’s email included a question on why I was so against using MTBF. This episode is my answer and why one should avoid MTBF
The MTBF and Modeling System Reliability
The Mean Time Between Failure (MTBF) appears in lots of textbooks and standards, so it must be really important … right? Well, not really.
When components in a system have constant Failure Rates, Mean Time Between Failure (MTBF) of the system can be used to calculate Reliability at any time within the Useful Life period
The mean life function (often denoted as “MTBF”) is not a good measurement when used as the sole reliability metric. Instead, the use of a reliability value with an associated time, along with an associated confidence level, is a more versatile and powerful metric for describing a product’s reliability
For people who are unable to establish a Failure/Time distribution to calculate reliability of their product, the easiest way to track Reliability is to use MTTF(MTBF) periodically. “Single Point” calculations are not suitable for warranty, spares allocation, etc. Should calculate the MTTF(MTBF) number at a Confidence Level.
Confidence limits for the mean are an interval estimate for the mean. Interval estimates are often desirable because the estimate of the mean varies from sample to sample. Instead of a single estimate for the mean, a confidence interval generates a lower and upper limit for the mean. The interval estimate gives an indication of how much uncertainty there is in our estimate of the true mean. The narrower the interval, the more precise is our estimate.