Your Reliability Engineering Professional Development Site
ANSI-IES TM-21 standard method may predict negative L70 LED lives. (L70 is the age at which LED lumens output has deteriorated to less than 70% of initial lumens.) Philips-Lumileds deserves credit for publishing the data that inspired an alternative L70 reliability estimation method based on geometric Brownian motion of stock prices in the Black-Scholes-Merton options price model. This gives the inverse Gauss distribution of L70 for LEDs.
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A process is described as inherently safer if it reduces or eliminates one or more process hazards and this reduction or elimination is accomplished through changes that are permanent and inseparable.Below are strategies for achieving inherent safety:
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Based on over 30 years’ experience with project risk management, the best way I found to monitor risk mitigation plans is to incorporate them into the Integrated Master Schedule (IMS). The reason is each month (or week) when the IMS is reviewed the risk mitigation plan is also reviewed. Since the IMS is linked, a slip in a mitigation plan step can readily be seen as well as the potential impact it may have on the project.
The question is How is the risk mitigation plan integrated into the IMS? This paper will explain how it tis done. [Read more…]
As a teenager in the 1980s, I was an avid reader of Omni, a now defunct magazine dedicated to the future—a far-off world filled with super humans, artificial biospheres and frequent encounters with extraterrestrial beings. Omni catered to armchair futurists like me with science and science fiction stories by A-level writers like Bernard Dixon and William Burroughs.
Future-oriented mass media such as Omni and “Star Wars” gives its consumers a plausible vision of everyday life for future generations. What these sources don’t typically deliver, though, is the path of change to get there.
[Read more…]In rare cases, lithium batteries can catch fire.
Lithium battery fires have resulted in recalls in the recent past – a few notable ones are indicated in the table below.
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A failure reporting, analysis, and corrective action system (FRACAS) is an important part of a reliability program. It is used to solve reliability and maintenance issues throughout a plant’s lifecycle. It uses a strict closed-end loop and iterative root causes analysis process. Properly executed, it can add considerable value to a business. However, there are some implementation traps to avoid and best practice tips that optimize results; here are six common issues to consider. [Read more…]
Robots are developed to address a problem. For example, automating a production line. To achieve this goal, a multidiscipline engineering team is required.
The question is which engineering discipline should I study? I suggest you get a degree in System Engineering. This paper will explain why.
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Example ACE 3T (Target-Tolerance-Test) Procedure with Reliability Standards: Machine performance is totally dependent on human beings. To address the problem of human error causing equipment failure, an Accuracy Controlled Enterprise sets best practice quality standards and uses 3T Target-Tolerance-Test work task quality control that assures high quality workmanship for high reliability results. Their work procedures are standardised so everyone follows the same methods to produce the same results, their training teaches people how to do craftsmanship work that creates outstandingly reliable plant and machinery. They create the reliability they want and as a result achieve operational excellence.
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In this episode, we talk about what a Failure Mode is and why Failure Modes are so important to equipment Reliability. As responsible custodians, it’s up to us to identify the plausible Failure Modes that could occur so that we can figure out if and how we should manage each one. If we don’t, it can end up in disaster.
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We have been burning wood since days of the caveman. But did you know that wood can also explode?
Logs of wood will not explode but fine dust can lead to a fire and explosion. Let us see why.
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In the 15th century, the English Royal Navy did not exist as a standing force. When needed, the Royal Navy was temporarily assembled using rented merchant ships. Henry VIII expanded England’s fleet from a handful of small converted merchant ships to a force of 30 purpose-built warships. He established government dockyards, the Admiralty, and the Navy Board. Starting in 1546, the Navy Board was a permanent part of the government.
Warships owned by the government had no other purpose and suddenly gave the government a new kind of asset to manage.
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Almost daily, we hear of some problem in the supply chain. A few weeks ago, a container ship got stuck in the Suez Canal and hundreds of ships were backed up with no place to go. As well, original equipment manufacturers in Europe missed critical parts because of their Just in Time delivery practices.
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Road Tanker Design For Fast Unloading And Onshore Pump Drain Tank. To completely empty a road tanker the compartments need to be designed to have a sump that permits total drain-out of the liquid from the lowest point. If a pump is mounted on the trailer, it is best mounted under the trailer. Where a pump is mounted on the tray or fenders it will cavitate at low tanker liquid levels. For an onshore unloading pump installation it is best to install a buffer tank between the tanker and onshore pump to let the road tanker completely drain-out before the pump starts cavitating. Tanker load-out pumps must have a very low net positive suction head requirement.
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Everyone working in a decision-making role has at least an intuitive understanding of the concept of opportunity costs-the value of the thing you didn’t choose. Simply stated, when you say ‘Yes’ to one thing, you simultaneously say ‘No’ to everything else you could have chosen instead. And those things to which you say ‘No’ have a value that you’re relinquishing. When I was a teenager, I heard an older gentleman quip, “When I said ‘I do’ to my wife, I was also saying ‘I don’t’ to all the other girls out there”. That man understood opportunity cost.
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