on Product Reliability

A listing in reverse chronological order of articles by:

Kirk Grey — Accelerated Reliability series

Les Warrington — Achieving the Benefits of Reliability series

Adam Bahret — Apex Ridge series

Michael Pfeifer — Metals Engineering and Product Reliability series

Fred Schenkelberg — Musings on Reliability and Maintenance series

Arthur Hart — Reliability Engineering Insights series

Chris Jackson — Reliability in Emerging Technology series

by Fred Schenkelberg Leave a Comment

Soft Skills For Reliability Engineers

The Hard Part is often Soft Skills

There are many paths to becoming a reliability engineer.

If you are good with statistics, enjoy the detective work of failure analysis, or simply want to create a durable long lasting product, you likely found yourself in a reliability engineering role.

A science or engineering background is a great start. Time spent working with a design or maintenance team certainly help. An advanced degree in reliability engineering is another path.

The element that is often missing as a precursor become starting a career in reliability is excellent soft skills. We know the engineering and science stuff. The formulas, the testing, the data analysis. We can get stuff done in the lab or on the shop floor.

Yet to become an exceptional reliability engineer, or any type of engineer, add the ability to communicate well. Add the ability to get your point across and to wield influence to help others understand and accept your proposals, ideas, and results. [Read more…]

by Adam Bahret Leave a Comment

Making the Connection

Why do so few product development programs make that connection between the product specification document content and the released product? It seems to be such a common thing that these two don’t connect that organizations don’t even bother to review or analyze this after release.

The mindset at that point seems to be:

We did the best we could with the resources we had
All product change from their original specifications
It transformed into a product that better fits our updated understanding of what could be made to satisfy the market

[Read more…]

by Adam Bahret Leave a Comment

The Specialist

I was in a meeting recently with a customer team. It was on-site with 12 people ranging from mid-level engineers to upper management. Someone defended me earlier in the meeting by saying “Well, he did write a book on it!” Which was nice and kinda cool to hear someone say. But this lead to a later comeback by a crusty, principle engineer, 40 years under his belt, boat captain from “Jaws” kind of guy. “If we can buy your book then why do we need you?”

I took a moment. I knew that not responding wasn’t what I wanted to do but had to tread carefully because a poorly crafted response could easily sound arrogant. This is what I responded with… [Read more…]

by Fred Schenkelberg 2 Comments

Guest Post: Why Soft Skills Are the Hardest Skills to Acquire

A Guest Post by Kay Sandberg, Christopher Harding, and Will Wilkinson of Luminary Communications

Remember that first time you were asked to step into a leadership or management role, or to manage a client relationship? The experience was probably exciting and unsettling at the same time. Something different was asked of you.

While many of us have succeeded as individual contributors or team members, succeeding as a leader or manager requires a new set of skills we have often not been given the opportunity to acquire. This applies whether we carry an official leadership responsibility or not. In a future article it would be interesting to explore the distinction between “leader” and “manager”. [Read more…]

by Adam Bahret Leave a Comment

Months or Miles?

We are all familiar with the base of our car warranties being in both months and miles. Some of that is that they want a definitive end to all warranty periods. But another reason is you can’t just boil down all aging factors to one stress. In a product development program, we are always under pressure to keep all activities as short as possible. Accelerated Life Testing ALT can loose almost all of it’s value when not executed with care. [Read more…]

by Fred Schenkelberg Leave a Comment

Using rain-flow counting methods for process wear out studies

Guest Post Prepared by Eugene Danneman, Wind Wear LLC

Introduction

Analyzing and visualizing data that is related to equipment wear-out (fatigue stage) over a specific time span is a challenge. Analyzing systems, equipment and components exposed to spectrum loading as opposed to uniform cyclical loading that span years or decades or centuries requires a special approach. Think of roads, bridges and other assets with long life spans that are susceptible to wear out mechanisms caused by external and internal loads, varying load durations, temperature swings and corrosion. [Read more…]

by Adam Bahret Leave a Comment

Stress Margin Design with perfect precision, and some parts blowing up

This video clip looks like a disaster but is actually a visualization of precision reliability engineering………. right after a disaster . [Read more…]

by Adam Bahret 7 Comments

Weibull explained (a bit)

Many of our customers (internal/external) trust us when we say that a Weibull analysis is the best approach to understanding what the data set is telling us. We then take their data set, do something mysterious where no one can see us, and then present these accurate predictions as to what is going to happen with a given population of the product at some future date. [Read more…]

by Fred Schenkelberg Leave a Comment

The Perfect Strength and Stress Concepts

Recently Peter Stuttard asked if I knew of a reference for the perfect strength and perfect stress concepts. I didn’t and asked for a bit of explanation of the phrases.

Here is his reply (via Linkedin, btw a great tool to get and stay in touch) posted with permission with minor formatting edits.

To learn more about Peter check out his Linkedin profile.

Fred

Thanks for responding so quickly, the concepts of Perfect Strength and Perfect Stress are related to your discussion re Parts Count and Parts Stress predictions and reading this on your web site prompted me to ask you about them. [Read more…]

by Adam Bahret Leave a Comment

Managing Up – Beyond the Analysis Numbers

Often when we request an analysis from an engineer we run with the results and don’t ask a lot of questions about the analysis itself. Having done a lot of analysis I am familiar with all the assumptions and estimations that go into making a calculation work. But that means that the results of the analysis are only relevant to those assumptions and estimations. The analyst may have to make the following “calls” without additional input or only a small fact-finding mission. [Read more…]

by Les Warrington 2 Comments

Making Your Reliability Data Analysis Count

Ensuring Reliability Data Analysis Leads to Positive Action

Convince, don’t confuse! Justify, don’t exaggerate!

Project managers want to deliver their product on time and on schedule. Design engineers want to believe that they have got it right. But your analysis, test results and field data suggest that there might be a problem. What do you do?

The key words here are “suggest” and “might be”. How should you present your evidence and analysis such that it doesn’t exaggerate with certainty, or confuse with statistics? How should you ensure that your conclusions lead to positive action? [Read more…]

by Fred Schenkelberg Leave a Comment

The Need to Improve the Reliability Narrative

Little Compromises and Future Costs

In a recent Seth Godin blog, Counting beans he talks about the eventual costs of little compromises. The immediate benefit may be celebration worthy, yet

But overlooked are the unknown costs over time, the erosion in brand, the loss in quality, the subtraction from something that took years to add up.

This certainly applies to reliability as well. Deferring maintenance just one more month, addressing one more software bug can be done after shipping, and similar small shifts erode reliability of your system. [Read more…]

by Adam Bahret Leave a Comment

The Systems Desire

My career path in systems engineering. I don’t mean my professional engineering career exactly. My systems engineering portfolio I would say started at about the age of nine if I had to pick a point in time. At nine I made a small hydro-electric power plant in the stream behind my house so I could have light in the woods. I could have taken a purely electrical approach, battery, wires, bulb, or a chemistry approach, matches, wood, oxygen, or a mechanical approach (actually how do you make light mechanically? Sparks??) anyway… But I took a systems approach. [Read more…]

by Fred Schenkelberg Leave a Comment

Interviewing for Reliability Position with Senior Managers

Preparing for an Interview with Senior Managers for a Reliability Engineering Position

Organizations around the world are recognizing the value of reliability engineering. Or, they are realizing that creating a durable product that delights the customer is good for business.

Another contributor to the interest in reliable products is the news of recalls. One recall not only distrupts the normal course of business, it may alter the future of the company. It may cause the collapse of the organization. Some do better than others, yet a major, in the news, recall is something to avoid. Creating a reliable product helps.

So you made it past the initial round of interview and have been called back to talk to the senior folks. As with any job interview, being prepared helps you present your best self. Understanding the business drivers motivating an interest in reliablity is essential for your preperation. This is not how to prepare an accelerated test plan type question, rather it is about how the results of an ALT will provide relevant value to the organization. [Read more…]

by Adam Bahret 1 Comment

A video of the great grandchild of the product of the first HALT

I don’t know if you recall a post from my blog, “HALT Testing is Not Always In a Chamber”, that discussed what I consider to be the first documented HALT test. Well I just found a video of the design solution in action and it is super cool. I discussed how during the development of the F1 rocket motor, for the Apollo space program, they solved a design issue with a HALT technique, although they didn’t call it HALT at the time. The issue they were attempting to solve was the thrust nozzles fracturing due to oscillating vibration. [Read more…]