#138 – LIFE TESTING: WHERE TO START? – FRED SCHENKELBERG

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ABC FredReliability or life testing involves estimating the expected durability over time of an item. This may be an entire system, a product, or an individual component. We may also focus on an element of a component, such as a material property. At the end of the testing we want to say something meaningful about the expected performance over time. Continue reading

#136 – HOW MANY RELIABILITY ENGINEERS DOES IT TAKE TO REPLACE A LIGHT BULB? – FRED SCHENKELBERG

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ABC FredHow many reliability engineers does it take to replace a light bulb? Well, none, but that’s because reliability engineers would use a reliable bulb to avoid the need for replacement.

Of more importance is answering the question ‘How many reliability engineers does an organization need?’ Is it

(a) none,

(b) one really good reliability engineering professional, or

(c) an entire staff of highly talented reliability engineers? Continue reading

#135 – HOW SAFE IS SAFE ENOUGH FOR YOUR SYSTEM – FRED SCHENKELBERG

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ABC FredSETTING THE MARGIN FOR SAFETY

Estimating the set of stress and stress curves is an interesting exercise that may have a greater purpose: safety. The connection is clear when considering the potential consequences of failure. For example, the loss of braking power when landing an aircraft may result in the aircraft rolling off the end of the runway. Continue reading