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3 Case Studies of How to Define the Right Reliability Requirements for Each Customer

3 Case Studies of How to Define the Right Reliability Requirements for Each Customer

We all probably know Fred’s fight against the use of “MTBF” as a default measure of reliability.

And I concur. “MTBF” offers the least insight to product reliability. It offers little to the user in terms of realizing the benefits of reliability.

However, we all would like to see products that deliver more appealing benefits; and reliability is a key factor. But reliability is only part of the equation.

Technical performance is important.

So is price. So is appearance. So is delivery. So is the customer: different customers may see the world differently. And so may your competitors.

So, we can’t all adopt the same measurement for reliability. [Read more…]

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Adjusting to Customer Expectations Changing

Adjusting to Customer Expectations Changing

Customers Expectations Tend Toward Better Reliability Over Time

Reliability goals or objectives are just a starting point.

You goals represent your target at one point in time.

At best they represent what your customers expect for reliability performance at one point in time.

When goals are set well, they anticipate what your customer expects when they receive your product. In a perfect world, you customer will find the reliability performance just a bit better than expected.

It’s not a perfect world. [Read more…]

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Introduction to Ongoing Reliability Testing

Introduction to Ongoing Reliability Testing

This type of reliability may have different names. A quick search of a few references in my library and I didn’t find ongoing reliability testing, ORT, in any of them.

It does exist and you may have heard of it before or even use some form of ORT. Or not.

Ongoing reliability testing or ORT is the continued evaluation of your product typically using samples drawn from production. The testing evaluates the reliability performance of recent production units.

The focus is on finding anomalies or changes that may occur in the design, supply chain, or production process that significantly changes field reliability performance. [Read more…]

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Effective DFMEAs

Effective DFMEAs

DFMEA’s definitely have a bad reputation as exercises that consume an enormous amount of time and unfortunately yield little value to the program.

And can be miserable to experience.

 

A quote from a customer “We aren’t going to do any more DFMEA’s because we feel a bit traumatized by the last round.”

I have also seen DFMEA’s be a cornerstone to a design program using its resources with surgical precision to improve the product.

I started to think about the differences between the ineffective and effective DFMEA’s.  Here are some of the steps that I believe make the “good ones”  GOOD. [Read more…]

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When Management Doesn’t Listen

When Management Doesn’t Listen

A Bloomberg articles details the Takata airbag recall series of events. The line that caught my attention is:

…company documents suggesting that Takata executives discounted concerns from their own employees and hid the potential danger…

“Sixty Million Car Bombs: Inside Takata’s Airbag Crisis”, Susan Berfield, et.al. Bloomberg Business Week, posted June 2nd, 2016, https://www.bloomberg.com/news/features/2016-06-02/sixty-million-car-bombs-inside-takata-s-air-bag-crisis

There are other examples where management doesn’t seem to listen when engineers raise concerns. Have we cried wolf too often? Has management gotten used to taken risks as a good business practice?

At times reliability risks are real and need to be clearly communicated. Let’s talk about how you can effectively get the message across. [Read more…]

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Never Purchase a Retired Rental Car

Never Purchase a Retired Rental Car

If you look around you day to day you can see a lot of examples of reliability testing.

When you are at the hardware store and looking at new power tools, notice which have broken switches, triggers, handles.  Many of us often just think it’s a defective one.  But it’s not.  It’s the weakest model of the bunch.

If all the models were put on display at similar times they have all been going through life cycle testing.  Every person that walks by picks it up and pulls the trigger, flips the switches bangs it around a bit.

It’s getting its life cycle testing done right in front of you. The one with the broken features is the model with the shortest life.  [Read more…]

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Introduction to the 6 Sigma Design Approach

Introduction to the 6 Sigma Design Approach

Sigma, σ, is the Greek character we use to represent standard deviation. 6 σ represents the spread of data about the mean. For data with a normal distribution, 6 σ includes 99.7% of the data.

The 6 σ design approach incorporates knowledge of the variation that will occur within the design such that the design has is unlikely to fail.

According to Mikel J. Harry, the foundation of excellence in product quality rests on achieving six sigma product quality. [1]  [Read more…]

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The Fundamental Set of Reliability Engineering Tools

The Fundamental Set of Reliability Engineering Tools

In a single meeting, you may need to structure a reliability model, create estimates, outline test plans, and discuss a field failure. The breadth of tools and knowledge to be effective is staggering.

No two problems, questions, situations, or industries are the same. Thus, the solutions you provide must differ as well. If you enjoy a complete set of reliability engineering tools at your disposal, you are well situated to address any question.

[Read more…]

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Plot Your Derating Guidelines

Plot Your Derating Guidelines

The concept of derating is similar to the mechanical engineering concept of a stress–strength analysis.

The intent is to ensure that the selected component or the mechanical design has sufficient strength to withstand the expected applied stresses.

Components operating at or near their rated values have short lives. Consequently, the general practice is to use components for materials well below their rated values to extend the operating life of the items.

This is where derating comes into play. [Read more…]

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Introduction to Derating

Introduction to Derating

Derating is the selection of components and materials according to a set of standardized safety-margin definitions.

It is used by design engineers to ensure the selected elements of the design do not experience performance problems due to overstress conditions.

Derating, like stress-strength analysis, assists the designer when selecting elements for the product or system.

The outcome is a robust design able to withstand the expected, and some of the unexpected, stress applied. [Read more…]

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Starting a Career in Reliability Engineering

Starting a Career in Reliability Engineering

Reliability engineers all have a start.

A point zero.

The transition point from pursuing something else, or nothing at all, then we begin our journey as a reliability engineering professional.

Getting started can be difficult and at times overwhelming.

Then you find Accendo Reliability and there is a lot of great content, maybe too much. So, this short article has the intent to create a starting point for you.

Plus, for those well along in their career, a request.

What is your advice to those just starting their career? My plan is to gather the advice from this community and assembly a start here guide just for those just starting their career.

Leave a comment below with your words of wisdom.  [Read more…]

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Guiding Programs by Product Goals

Guiding Programs by Product Goals

A term that I use when describing product goals that are tangible and drive program decisions is “Product Asset.”

A Product Asset is “a fundamental attribute of a product that can be characterized as a quantitative measurable goal.”

The five Product Assets that I commonly select are the following:

  • technology features
  • reliability/quality
  • time to market
  • product cost
  • development program cost (considered an anchor asset)

[Read more…]

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5 Ways You Know a Reliability Program is Working

5 Ways You Know a Reliability Program is Working

When your reliability program is working well, it may be difficult to recognize the benefits incurred.

Likewise, when the program is not working, it is obvious.

As you work to improve your program, keep in mind you may need to include elements to ensure your efforts remain visible.

I don’t mean staging field issues that you can solve quickly, rather that you are able to show the impact you and your program make to the organization. [Read more…]