Your Reliability Engineering Professional Development Site
A listing in reverse chronological order of articles by:
In the previous article I discussed sources of stressors that can cause degradation of the materials in components and joints. In this article I’ll discuss the basics of metal corrosion – the electrochemical cell, seven common forms of corrosion, and examples of metals engineering and mechanical design approaches to control corrosion.
In the previous articles I discussed the component design process, the considerations for designing components, and the importance of leveraging materials engineering to design components that meet performance and reliability requirements at low cost.
I will start focusing on reliability, discussing the considerations for identifying component and joint reliability requirements. I will refer only to components for ease of writing and reading, but the discussion also applies to metallurgical joints, i.e. weld, braze, and solder joints.
In this article, I will discuss identification of the conditions that can cause degradation of the materials that comprise components and joints. [Read more…]
In the previous article I discussed product design in general and the importance of leveraging materials engineering to design components that meet performance and reliability requirements at low cost. Both component form and materials can and should be engineered to optimize a component’s design.
In this article I discuss a component design process that explicitly includes materials engineering considerations. This process involves consideration of all design requirements and cost. Not just designing for reliability. That’s where selecting materials gets tricky – having to consider different sets of requirements and design for ease of component fabrication and joining.
This article is the first in a series about material engineering and product reliability. The intent of the article is to provide you with a basic understanding of product reliability as viewed through the eyes of a material engineer. When I first talk to engineers who have a different background or focus, I start with the basics. As we speak more, I expand into relevant areas one at a time. That is what I hope to do with this series. Introduce you to some basics, and then move on to a deeper dive into the topic.
When considering product reliability, a materials engineer is concerned with how the materials in components respond when exposed to stressors that can cause the materials to degrade. Stressors include mechanical loads, corrosive environments, chemicals, heat and cold, electricity, and radiation. You may find additional stressors based on the environment components are used in, or how they are used. It’s a problem if a component or joint in a product degrades to the point where it stops functioning as required.
A plan is a road map toward a destination. It provide guidance toward a goal. The idea of a plan is to consider the path forward, the knowledge necessary to acquire, and the decisions along the way.
No plan is perfect other than those that successfully accommodate the successes and setbacks along the way. No plan can anticipate all the information yet to be uncovered, yet it can set a course to deliberately uncover what is necessary to move forward.
One of my more unfortunate memories of my early military career is the death of a soldier on a training exercise. I was posted to a place very close to the equator … along with the heat and humidity that came with it. The soldier who died suffered from heat stroke, brought on by dehydration. And when we looked back on what went wrong, a key issue was that the training exercise risk assessment was ‘word for word’ identical to previous risk assessments when it came to managing heat related illnesses.
Organizations are all about ‘success.’ Being ‘successful.’ Which can many different things to many different people. ‘Success’ is not simply the ‘antithesis of failure.’ One could argue that ‘mediocrity’ in many cases is accepted as the antithesis of ‘failure.’ ‘Mediocrity’ is hardly the same as ‘success.’
Organizational success means that a lot of different people need to be doing lots of very different, but very important things. And this often means things that can go unnoticed. The ‘one percenters.’ Getting things done right the first time.
I often start teaching my reliability engineering courses … by focusing on other reliability engineering courses. Why? Because they exemplify what is wrong with how most ‘reliability experts’ go about convincing others to take reliability seriously.
A typical reliability engineering course will start with images of disaster. A Chernobyl here. A Fukushima there. A crashed airplane. The Tacoma Narrows Bridge. Lots of other atrocities that happen when we don’t do reliability engineering properly.
I (like most of us) try to keep learning about stuff. And this includes (on occasion) listening to guys like Simon Sinek who has made a name for himself as an inspirational speaker and author. I learn a lot from some of his stuff. Most people like Simon are skilled at simplifying fundamentally ‘good’ ideas and principles into really simple messages that are easy to break through our sometimes cluttered brains.
We’ve all been ‘there.’ Watching the ‘mechanical’ design team lead go through 378 PowerPoint slides of suffocating technical content, pixelated iPhone pictures of bearing housings, and lists of ‘open’ items in fonts that are too small. There are ‘senior’ engineers wheeled in to ‘review’ but instead nod knowingly and ask sporadic questions about something they once designed ‘back in the day.’ And the chairperson will often ask our ‘mechanical’ design team lead if they are ‘on track.’
At the 2019 Annual Reliability and Maintainability Symposium, I was involved in a discussion with US Department of Defense (DoD) reliability engineering teams and industry representatives. And on the agenda was a review of an emerging document called the ‘Reliability and Maintainability Engineering Management Body of Knowledge.’ Let’s call this the ‘DoD RAM BOK’ for short.
I only had access to this document’s quick reference guide, and it suggests that the DoD RAM BOK describes what reliability engineering activities need to happen from ‘concept’ through to ‘operations’ for a typical military capability being introduced into service.
I was having a lunch meeting with a project manager, and the topic of outsourcing came up. Specifically, outsourcing the manufacture of a particular machine that would form part of a larger vehicle system. I asked him why he was doing this, particularly when for many years the predecessor to this machine was very successfully manufactured in-house. His answer was simple.
It was to transfer risk to a supplier. [Read more…]
There are plenty of reasons for renewable energy to become increasingly important. These reasons start with climate change and end with our unmistakably finite amount of fossil fuels buried in our fragile planet. One of the early criticisms of renewable energy was that it wasn’t cheap. Sure – the energy sources such as sunlight, wind and flowing water are inherently renewable, but the costs to manufacture and maintain all the equipment that extracts energy from these resources can be very high. [Read more…]
When a reliability engineer or manager does their job well, the product just works as expected. Maybe even a little better than expected. There isn’t any major problems that need a hero to resolve.
Work done well, may go unnoticed. To avoid that you need to master the art of promoting successes without coming across as bragging or boasting. For your career advancement, you need to be both successful and likable.
For your program and ability to influence outcomes, you also need to be seen as successful, valuable, and again likable. [Read more…]
Steve Tengler from Forbes Magazine recently wrote about how Audi was improving the reliability and quality of its cars … by helping its suppliers. And while I wished he had a little more robustness behind his conclusions, he reinforced just how important it is to focus on who makes your products and not just what they make. [Read more…]
