Several times during my career, as I’ve listened across the interview table to an eager and aspiring job candidate, I’ve realized this person has very few skills that will readily transfer into the position I’m offering. They spent years working at their previous company. But how much work will immediately apply to our open position. And conversely, how much work will be required to get them up to speed? And in that moment, I mentally moved them to the bottom of my “viable candidates” list. Why? Because that candidate has too few transferrable skills. [Read more…]
on Tools & Techniques
A listing in reverse chronological order of articles by:
- Dennis Craggs — Big Data Analytics series
- Perry Parendo — Experimental Design for NPD series
- Dev Raheja — Innovative Thinking in Reliability and Durability series
- Oleg Ivanov — Inside and Beyond HALT series
- Carl Carlson — Inside FMEA series
- Steven Wachs — Integral Concepts series
- Shane Turcott — Learning from Failures series
- Larry George — Progress in Field Reliability? series
- Gabor Szabo — R for Engineering series
- Matthew Reid — Reliability Engineering Using Python series
- Kevin Stewart — Reliability Relfections series
- Anne Meixner — Testing 1 2 3 series
- Ray Harkins — The Manufacturing Academy series
FMEA and Robust Design
One of the most important concepts in designing for reliability is robust design. This article is a high-level overview of robust design and its relationship to FMEA.
“For the robust, an error is information.” Nassim Nicholas Taleb
Risk-Based Analysis of Random Variables
Also by co-author: Mark Fiedeldey
Business today is more competitive than ever. As a result, successful business leaders often need to make quick decisions with less than complete data. The wrong decision could result in significant losses, layoffs, or worse. This is where quality professionals and other data-savvy specialists can offer some assistance: by making the best analysis possible given the available data. [Read more…]
Common Mistakes in a Capital Equipment Justification
Return on Investment Analysis (ROIA), sometimes referred to as Capital Equipment Justification, is the process of building and analyzing a financial model for the purpose of determining the net financial contribution of obtaining a major investment like a factory building or piece of production equipment.
ROIA is the link that connect the brilliant ideas of makers–the engineers, designers and builders—to the goals of the managers who hold organization’s purse strings. When thoroughly conducted, ROIA aligns the best estimates of the revenues and expenses related to a potential purchase with the years in which they will occur.
Hazard Analysis and FMEA
“The danger which is least expected soonest comes to us.” Voltaire
This article discusses the application of Hazard Analysis, why it is used, and the similarities and differences with FMEA.
What are the Best Reference Books for Quality Engineers?
In this age of infinite information at our fingertips, it seems that fewer people are finding reference books and investing in their own libraries. After all, googling whatever’s on your mind is free and easy. But books, especially reference books and textbooks, still have a necessary place in our information age. [Read more…]
Corrosion Under Insulation (Stainless Steel)
In the previous Learning From Failure article, we reviewed that chloride stress corrosion cracking (Cl-SCC) of stainless steel readily occurs at temperatures above 140°F (>60°C) when exposed to aqueous (water-based) chlorides. Although the most attention is given to corrosion from product exposure, Cl-SCC can also occur from the external surfaces as a result of corrosion under insulation (CUI). Here is an example. [Read more…]
Return on Investment Analysis for Engineering Managers
A commonly encountered fork in the career road for many successful engineers is to a) continue engineering or b) manage others who engineer. To continue engineering is an obvious choice, and an often desired one. [Read more…]
Understanding Software FMEA
“My software never has bugs. It just develops random features.” Anonymous
More and more mechanical and electrical systems include software integration. The FMEA methodology applies very well to software as well as hardware. It is possible to include software functionality in the System FMEA as part of the functional descriptions. However, for complex software functionality such as embedded control systems, it may be useful to perform a separate software FMEA.
What is Depreciation?
Depreciation is one of the more poorly understood, yet commonly encountered terms in managerial accounting. In accounting lingo, depreciation is the systematic allocation of the cost of an asset across its useful life. That’s a mouthful. But breaking down the definition into simpler terms helps explain how its used and why it’s important when conducting Return on Investment Analysis. [Read more…]
The Net Present Value Method: Measuring the True Value of an Investment
In the previous three articles, we’ve examined the Break-even Analysis and Pay-back Period methods (Part 1 and Part 2) as means of evaluating capital investments. While these back-of-the-napkin methods are excellent starting points for analyzing investments, they’re both poor ending points. Neither provide a reliable basis for comparing investments side-by-side. And neither tell you how much value an investment is adding to your organization. [Read more…]
Chloride Stress Corrosion Cracking
It is well known that chloride stress corrosion cracking (Cl-SCC) of stainless steel is caused by the combination of (1) aqueous chlorides, (2) stress and (3) temperature. Yet even with great awareness, Cl-SCC still manages to sneak up and cause many surprise failures. Here is a failure analysis case study to summarize the key factors causing this corrosion cracking mode. [Read more…]
The Problems with Payback Period, Part 2
The problems with the payback period method as a means of analyzing and comparing potential investments extend beyond its problem with the time value of money. In fact, that problem can be corrected (but rarely is in practice) by using a method called the “Discounted Payback Period”, where the future expected cash flows are “discounted” to align them with the present value of the initial investment. But even with that correction, the Payback Period Method is still lacking as a primary return on investment (ROI) analysis tool. [Read more…]
Legal Guidelines for FMEAs
FMEAs are legal documents that support the demonstration of due care in product development. FMEA teams should ensure their worksheets are consistent with good legal practices for documents, and follow company legal guidelines.
“Common sense often makes good law.” William Orville Douglas, past Justice of the Supreme Court
The Problems with Payback Period, Part 1
If you’ve ever participated on a project team considering the purchase of a major piece of equipment, you’ve almost certainly heard of “Payback Period” – the length of time projected to recoup an initial investment through cost savings, increase profits, etc. It’s fairly simple to calculate: [Read more…]
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