Your Reliability Engineering Professional Development Site
All articles listed in reverse chronological order.
Properly conducted RCAs are time and resource consuming, so when we are not getting the expected ROI’s from our efforts, we have to consider why are we wasting so much money doing the same thing over and over again? This article will focus on the commercial and process aspects of RCA, that can take away from their effectiveness on the corporate bottom-line and impact the safety of our co-workers.
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Recently, we ran a two-week-long survey about training. It asked two questions and here are the results:
For training of your workforce, which do you prefer?
Nearly 3000 viewed the question and 70 answered:
The 20th Century saw maintenance strategy evolve from corrective, predictive and preventive maintenance to reliability maximization. During the 21st century maintenance will disappear and be replaced with risk-free equipment operation where no failures occur. The first steps taken by LRS Consultants toward building risk-free businesses and riskless operational processes was the invention of the Plant Wellness Way “system-of-reliability” methodology.
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In a previous article I explored how workers and employers should approach the future and opined that both would be better off if they each understood the motivations and tactics that the other would employ to further their interests. Workers are concerned about achieving and maintaining marketability to employers and companies are concerned about acquiring the workforce they need to compete in the markets in which they do business. I assert that understanding what’s driving the approach each side will take to achieve its aims will be crucial to competing.
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In measurement science, “bias” refers to the systematic error component of the measurement system. Unlike other types of measurement error that are randomly distributed, a bias predictably shifts a measurement in the same direction.
For instance, I recently facilitated a “round robin” measurement correlation study with two other companies, where we compared the outputs of our hardness testers using the same set of test samples. While preparing for that study, I realized that one of our hardness testers, on average, tested 1.1 Rockwell B points higher than the reference sample. It wasn’t testing exactly 1.1 points over, but instead ranged from .8 to 1.4 points over across a series of tests. In other words, we had two error components: a bias of +1.1 points and a random error of +/- .3 points. To compensate for this bias, we shifted down the output reading of the tester by 1.1 points, leaving only the random error component in our tester’s output values.
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George Williams, CEO of ReliabilityX, telling us why we should use Ultrasound Technology
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As I rode, I thought, how could I use reliability statistics to optimize a solar-tube production line? Then I noticed a brass glint in the scrub brush. It didn’t look like trash, so I stopped and found an old brass oil lamp like Aladdin’s. Naturally, I rubbed it. There was a flash and a puff of smoke, and out popped the genie who said, “Yes master, by the powers vested in me, I grant you three wishes.”
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In our daily lives we often become immune to risks around us. For example, there are around 40,000 annual fatalities from automobile accidents in the US and yet we do not think twice before getting into their cars. We eat a burger ignoring the risks of heart problems!
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It is easy to get caught in this trap. After months of working on an issue, you are asked to provide an informational update to a group of senior decision makers. You understand that no decision will come from your presentation. And there is not much on the agenda, so you are free to make as much as 30 minutes to provide your update.
Your presentation can be a little less formal and use the entire time, right? Wrong.
Does procedural and/or regulatory compliance with RCA guidelines ensure Operational Reliability? Does it ensure improved Safety? Operational Reliability involves the aggregation of Equipment, Process and Human Reliability methods and techniques.
What is the difference between troubleshooting, problem solving and ‘RCA’? Are the outcomes different when we use The 5-Whys, The Fishbone or a Logic Tree/Causal Factor Type Tree?
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Here’s an example of how a metallurgical failure analysis led to identification of the root cause of a failure, and to identification of the corrective actions needed to prevent the failures from recurring.
As I discussed in my previous article, metallurgical failure analysis can be used to improve product reliability. The information from failure analysis of a failed component is used to determine the root cause of the failure. Once the root cause is identified, the failure analysis data and findings is used to help identify the corrective measures required to prevent the failure from recurring.
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The Board of Adjustment was having a hard time making a decision. The property owner’s new woodworking shop extends six feet into the required side-lot setback. Even worse, it blocks the scenic view of the neighbor, who paid a premium for the lot.
“So, whose fault is it that the building was built in the wrong place,” asked the board chairman. “Clearly, it was shown on the approved drawing in the right place.”
“I am still trying to figure it out, “replied the property owner.” I hired the best surveyor in town and one of the best contractors. I know it will cost me over $30,000 to move it over six feet. I paid a premium to make it look good like my house, and I am afraid it will look worse after the move. And I don’t have the $30,000 to move it.”
In rebuttal, the neighbor explained, “right is right.” The building location violated the town’s planning and zoning codes. The correct location had been formally approved by town staff, and there was no relief they could provide because this was clearly wrong. Leaving the building in the wrong place would devalue his property much more than $30,000. If the Board of Adjustment did not uphold the ordinance, he would be the victim of something he had no control over.
Much like the song, “Lookin’ for Love in All the Wrong Places” sung by Johnny Lee; risk management professionals need to ask the question “Are we searching for risk in all the wrong places”? Are risk professionals being deluded or deluding themselves by seeing risk based on media driven analysis; applying outmoded tools, models, etc. that no longer reflect the reality of risk?
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Split And Clamped Mounting Hub For Shaft Attachments. For speedy and easy maintenance it is best to use a clamped hub to mount attachments to shafts when possible. This article presents a conceptual design of a split hub bolted and clamped to a shaft. The required attachment is then mounted to the removable hub.
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In manufacturing environments, especially in high-volume production processes, it is important to ensure the highest Machine availability rate for critical equipment as a crucial factor in achieving the expected output goals. The more the availability value there is, the better the plant’s capacity to achieve production requirements since the time available for each piece of equipment will be maximized.
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