Your Reliability Engineering Professional Development Site
All articles listed in reverse chronological order.
Guest Post by Geary Sikich (first posted on CERM ® RISK INSIGHTS – reposted here with permission)
If you want senior management to pay attention give them something that challenges their focus – and understand that their focus is not on how many computers you have or RTO, RPO stats. It is on business survivability – will we be in business tomorrow given the issues that we face today. [Read more…]
Bridging is the name given to the self- created arch that develops just above the outlet of a bulk material silo or hopper as it empties.
A bridge forms when wall friction holds up the ends of the arch.
To overcome bridging the wall friction must be reduced or prevented from occurring. [Read more…]
It is a very conscious decision to have reliability be a part of your products brand.
What conversations with marketing and the leadership have occurred for your next product development program?
Was there a conscious decision to place your product in a certain range of reliability?
Too many times it’s a discussion that happens as the product is reaching it’s Beta stage of development, “Let’s measure its reliability and see where it’s at and if we need to improve it”.
You can measure reliability that late in the game but you have little opportunity to change it. So what if it is far lower than the product target market expects?
What if it is far overbuilt and millions of dollars of cost savings were missed in this first generation of the design?
It happens this way more than not. [Read more…]
Upon my son’s return from studying abroad for a semester, I asked him what he learned. He said there are a lot of smart people in the world.
I concur. [Read more…]
Replace After MTTF Time To Avoid Failures – Right?Received a short question last week. The person writing seems to already know the answer, yet asked:
If we replace an item after a duration equal to the MTTF value, we would avoid failures, right?
Well, no, most likely not, was my response. What is your response? How would you answer this question? [Read more…]
Welcome to the final blog in my 10-part series called “Uptime Insights”, where we explore a journey of excellence in maintenance. To stay on top, managers must implement strategies that keep operations performing at high levels. In these articles I will show you how to achieve excellence in maintenance – a critical business process in any capital intensive industry. [Read more…]
The offered warranty is an internal part of many purchase decisions, plus many business models.
While obligatory to offer a warranty, especially for consumer products, the specific terms, duration, and eventual total cost of honoring warranty claims may vary dramatically.
One key to managing the overall warranty expense is to estimate the potential future warranty claims, followed by accurately tracking actual expenses during the warranty period. [Read more…]
Control valves regulate the flow of a liquid or gas by opening or closing internal passages.
They form part of a control loop used to control a process. The control valves respond to instructions from the controller and adjust the internal openings accordingly.
Keywords: sensor, setpoint, trim, actuator, sealing class, tuning, proportional, integral, derivative. [Read more…]
Guest Post by Geary Sikich (first posted on CERM ® RISK INSIGHTS – reposted here with permission)
From financial crises to energy catastrophes to earthquakes and threats of terrorism, we hear a lot about events that challenge our ability to identify and manage risk.
Unfortunately, some of the things that emerge from many of these events are reactive regulatory rules and requirements. [Read more…]
During the design phase, we make decisions that create the eventual reliability performance of a product.
It is the decisions we make that matter.
Also during the design phase, we explore numerous questions. [Read more…]
Reliability Goal and ConfidenceWe establish reliability goals and measure reliability performance.
They are not the same thing. Goals and measures, while related, are not the same nor serve the same purpose. [Read more…]
Welcome to part nine of my 10-part series of blogs called “Uptime Insights”, where we explore a journey of excellence in maintenance. To stay on top, managers must implement strategies that keep operations performing at high levels. In these articles I will show you how to achieve excellence in maintenance – a critical business process in any capital intensive industry. [Read more…]
Net positive suction head losses (or why you can suck through a straw).
Pumps cavitate and run dry when the pressure leading into them falls below the vapor pressure of what they are pumping. At vapor pressure, the liquid boils into a vapor and fills the pipe.
In order to know that the pressure to a pump is always above the vapor pressure, it is necessary to calculate that the pressure losses from pipe friction and suction lift will not cause the pressure to drop under the vapor pressure.
The presence of dissolved gas in the liquid complicates the problem. [Read more…]
Guest Post by Keith Ridgeway (first posted on CERM ® RISK INSIGHTS – reposted here with permission)
Did you know on average around 30% of all organisations do not know what they own, where their assets are located or who is using them; and over 65% of information recorded on asset registers is incomplete, inaccurate or even missing. What’s more concerning is a number of these assets may not be statutory compliant e.g passenger/good/DDA lifts, fire, gas, pressure asset etc. [Read more…]
We’ve collected data and it’s time for the analysis.
As you may recall, in the last article on Planning a Taguchi L4 Array Experiment, we drafted a set of four prototypes. The specific arrangement of factors and levels will now allow us to analyze each factor separately.
The intent is to find the optimal level or setting for each factor, plus which is the most important factor. [Read more…]