My wife (Beth) and I both train and compete in Brazilian Jiu Jitsu. It’s a grappling sport like wrestling. In Jiu Jitsu your Gi (the karate looking uniform) is a big part of the sport. It’s a very heavy fabric with very specific features that are inspected before each match. Many moves involve the GI, especially the jacket. I have wrapped my sleeve around someones neck for a choke, You can grab the end of both of the opponents sleeves and dig your feed into their elbows to lock up their arms and throw them, you can use an opponent’s own lapel and wrap it around their neck for a submission or simply to roll them any way you wish.
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
- Fred Schenkelberg — Musings on Reliability and Maintenance series
- Chris Jackson — Reliability in Emerging Technology series
It’s been a few years since I have had a Porsche 911 in the stable. It seemed like the right time since were down to only two sports cars in addition to the daily drivers. I think five cars is the bare minimum these days. “It’s only a problem if you want to stop but can’t.” I don’t want to. There are some less free spirited individuals in the house who have expressed differing opinions.
I was recently in New York City for work. I stopped by to see a friend in the area. He said “I have something interesting to show you.” I was pretty excited because when Mark says “I have something interesting to show you.” you know it is going to be good. He’s a writer and his passion is finding strange and interesting things. My personal Indiana Jones. Many days he wakes up and just gives himself some adventure assignment and the goes searching for it.
In the article Calculating Network Reliability the lack of published analytical solution for dual-ring network reliability was highlighted. This article provides a neat solution and further challenges readers to offer their proof or prior publication reference. The solution and the author’s general proof will be presented at RAMS 2020.
If you recall I went on a slightly crazy adventure up to the edge of the article circle with my adventure buddy, my daughter Natalie, 11. We almost froze to death on a mountain just to see the Northern Lights (story here). But we also did something we both have always wanted to do and knew would be epic, a dog sled ride. The first thing I have to say about it is holy crap those dogs are fast. It felt like you could blow the doors off a snowmobile if you came across one.
I was recently giving a presentation for IEEE at MIT Lincoln Labs here in the Boston area. The topic was one of my favorites, my new playground, Use Case 7 ! The crowd loved the idea of expanding how we access use cases and came up with great examples. and experiences, of their own. They found many areas in their work where the Use Case 7 exercise may yield some interesting insight.
I have worked in the field of reliability for a good many years. I have presented both beginner and advanced reliability engineering courses. I have even read several books. 🙂 But, across all this, component redundancy has never been explained beyond simple serial and parallel configurations.
So, it was a shock to my system to be presented with a scenario that couldn’t be solved using a simple parallel system.
My previous work had challenged me only as far as:
- Active parallel
- Stand-by parallel
- M-out-of-n parallel
- Keystone-component parallel
But now I was being challenged by a network that was none of these.
The Importance of a Reliability Engineering Community
Years ago I was a part of a reliability engineering community and I had not met more than two or three members. This was before the internet and was using a new-fangled system called an email list.
At the time, it filled the role of helping me understand the many facets of reliability engineering. It helped me answer questions and allowed me to help others as well.
My desire is to help create more such communities that can help you and your organization improve the discussion concerning reliability. Let’s explore exactly how to make this work. [Read more…]
What Should I Learn as a Reliability Engineer?
Ran across this question the other day from someone just starting in the role of reliability engineer. I wasn’t smart enough to ask this question when I started in the field, yet looking back I’m sure to have found the list of what one should learn and apply daunting. [Read more…]
In February I did a hit and run trip to Fairbanks Alaska with my daughter, age 11, to try and see the Northern Lights. It was a long shot but I’ve done nuttier expeditions and she was game. It was actually her idea, and she knew who the right person was to ask for such a trip. She turned 11 in January. I asked her what she wanted for her birthday. I was ready for the “this or that electronic” request. Instead she said “I want to see the Northern Lights.” First thought was “Geez that’s a bit extravagant” but then my second thought was she’s 11 and this could have a great impact on her and what an interesting/cool thing to ask for. It might energize an interest in physics or natural photography, or cold weather clothing design. I also thought about how in a few years she may not want to do anything with me because I’ll be an “idiot who doesn’t get it.”
Published in Quality Progress in Nov. 2018, pp 34-39. Final 1/27/18 Posted here with permission of Dr. Wayne Nelson and by his suggestion.
PREDICTING REPAIR RATES WITH PLOTS
Guest post by: Wayne B. Nelson, consultant
Schenectady, NY , WNconsult@aol.com
In the past five weeks I have been to Miami, Orlando, Cleveland, Chicago, Fairbanks Alaska, Fortuna Costa Rica. For one stint of that I went Fairbanks to Boston to Costa Rica in a 24 hr period. I walked into my home dropped the Alaska suitcase, grabbed the prepacked Cost Rica suitcase, slept for 6 hours ,and was back on a plane 13 hrs later. I think that qualifies as a HALT test considering the lowest temperature I experienced in Fairbanks (Arctic circle edge) was -30F on top of a mountain and then 85F in Costa Rica in the Rainforest.
So why did I do all of this? Because it’s me and it seemed fun.
Anyone who knows me knows I love modifying things. I always feel there is a better design. This is the goal of a reliability engineer at heart. I enjoy sports and I enjoy running. I do believe that we were born to run. If you look at the human body that is clearly what it was built for. Our big toe faces forward, which makes them no longer good for gripping things like branches. But it does make them great for landing a foot in forward motion. We have extremely long legs in proportion to our bodies compared to all other primates. We are slender which provide a great ratio of surface area to mass for cooling. The ability to sweat without hair is a great temperature control method as well. We are also the only mammal that can uncouple our breathing to our running pace because we are bipeds. This let’s us optimize our breathing for long distance.
Review: What is the Reliability of the Reliability Function?
Jezdimir Knezevic of the MIRCE Akademy published a paper with the title above and I have a few comments.
In the article, Jezdimir suggests that the statistical approach to describing the world about us is fundamental flaws and not inherently useful for our use. He compares a mathematical/statistical approach to a scientific approach and finds the stats wanting.
Let’s take a critical look at the topic of this paper and conclusions. [Read more…]
The Mars Rover is an incredible reliability story. And as you may know they have decided to permanently shut it off. A friend recently sent me this email when he saw an article on it.
The Opportunity rover was supposed to last 90 days, and instead lasted 15 years.
Is that due to remarkable engineering, or was the machine really supposed to last that long and the scientists blew their calculations as to its “lifespan”?