July 2007

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HP Automation Safety: All failures are systematic

      For many years, a debate has been ongoing over random vs. systematic failures. Why all the fuss? In functional safety work, one must treat "systematic" failures very differently f..

Goble, W., exida LLC

      For many years, a debate has been ongoing over random vs. systematic failures. Why all the fuss? In functional safety work, one must treat "systematic" failures very differently from "random" failures. A systematic failure is caused by a human error. This can be a design error, a mistake made during installation or a maintenance error such as miscalibration of equipment. A random failure is defined as a malfunction due to a random event occurring indiscriminately in time. The reason for this distinction is important, and functional safety standards deal with these failure types quite differently. Systematic failures. We avoid systematic failures by creating desig

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