Your Reliability Engineering Professional Development Site
Find all articles across all article series listed in reverse chronological order.
The LinkedIn ASQ RRD group published this question from a reliability manager. Replies included:
In the 19th century, factories and mills were major concentrations of capital. Manufacturing completed for investment money, and business cases could be as closely examined as any other risky investment. In 1884, Edwin Matheson wrote about how maintenance affected accounting and business prospects in The Depreciation of Factories and their Valuation. Matheson’s book became the basis of modern views of depreciation.
Confidence boundaries can be confusing to reliability engineering practitioners and their audience. Yet, they can play an important role in the risk-based decision-making process. When building statistical models, there is always uncertainty around the model because it is usually based on a smaller sample of the studied population. The confidence interval is the range of values you expect your model to fall between a certain percentage of the time if you run your experiment again or re-sample the population similarly. For example, using a 90% confidence boundary, one would expect 90% of the records to fall between the upper and lower confidence boundaries. As a rule of thumb, the more data you have, the more precise the model and the narrower the confidence boundaries. In essence, if we have an infinite amount of data, we will end up with a perfect model. However, this is never the case. Confidence boundaries help establish the accuracy of the model and also provide some information on the validity of the data.
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According to the FAA, there have been 113 battery fire incidents on passenger and cargo planes between 1991-2010. There is a battery fire incident every two months in the airline industry.
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Every Reliability Engineer will be familiar with the Weibull Analysis. Most of us even have an Excel template laying around that we refer to!
The problem is, that when we have to handle Suspended data (e.g. components that haven’t failed yet at time of observation), the Excel sheet must use VBA in the background if the user wants a “single-button” tool.
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Over thirty years ago, Steven R. Covey, renowned author and business management guru, introduced to us The 7 Habits of Highly Effective People, which presented an approach to being effective in attaining personal or business goals by aligning to what he called “True North” principles based on character ethics. This book has become a best seller, a must-read, and has sold 40 million copies worldwide.
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It looks like 2023 will be the hottest year on record. Along with all the cyclones, hurricanes, floods and bushfires we have already had. Those who study and take climate change seriously unanimously agree that man-made changes to the environment are causing the climate to change so fast that mother nature will struggle to keep up.
And for the minority (yes, it is a minority as has been confirmed by many surveys and studies across the world), their arguments against climate change go something like this …
It might not be because of us …
… so it’s definitely not because of us.
One of the common questions teams have when they first explore using Predictive Maintenance is “Is the data good enough to perform the analysis?” Answer to that question is nuanced with the reliability objective and the quality of the data available.
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Let a Plant Wellness Way EAM System-of-Reliability halve your Annual Maintenance Costs
The Plant Wellness Way is business paradigm to create world-class performance and results in any operation by the correct selection and use of engineering, operating, maintenance, and reliability strategy and practices.
The six IONICS steps are used to develop lifecycle asset management, reliability improvement and maintenance management strategy and activities needed for endless operational excellence. Simply identify where you are in the above process map, come in at that point, and then continue on through the process to the point where your answers are available.
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Strategic alliances are a vital tool to driving growth by enabling access to external capabilities. They are collaborations, partnerships, or joint ventures whereby organisations, or partners, work together for a common purpose to achieve a common business benefit or purpose.
As much as strategic alliances are an important tool to drive growth and deliver needed capabilities, they are not without their challenges and risks.
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Are generic lists of failure information useful to FMEA teams? Are they a good idea or not?
There is a lot of discussion amongst FMEA practitioners on automating and standardizing FMEAs. In this article, I will discuss the pros and cons of using generic lists of failure modes, effects and causes.
The Oxford English dictionary defines “generic” as “characteristic of or relating to a class or group of things; not specific.” [Read more…]
Assets typically age over time, leading to degraded performance and loss of function. Asset life models are built in order to predict future degradation patterns. Those models are based on asset degradation variables such as time or usage. Those variables could be for example, time between failures or distance covered between failures. Many assets have more than one degradation variable. In this case, it is important to define which of the multiple variables is the dominant one and will subsequently provide the Reliability Engineer with the most precise life model.
Reliability is a probability. Specifically, the probability that a system will perform its intended function within a specified mission time and under specific process conditions. Therefore, most reliability calculations incorporate a time element as a degradation variable. Generally, when building life models, we default to using calendar time as it is more straightforward. We have had tools to easily measure elapsed calendar time for centuries now. [Read more…]
Climate change is universally accepted. And when I say ‘universally,’ I mean that the only people who think it is not a thing are fringe elements of society who are predisposed to specific interpretations of religion or commercial greed that would be harmed by any attack on fossil fuels and the energy we derive from them.
The good thing about this is that organizations who are serious about being successful and profitable can’t do so by sharing the ideology of a small minority. More and more people (including younger humans who will be the decision makers of tomorrow) are demanding more and more from the organizations they buy services and products from – especially when it comes to environmental concerns.
So to be successful, you need to take this stuff seriously.
