Math in Engineering

Industrial Andaeronautical Engineering

What is reliability?

Industrial engineers use another type of statistical technique called reliability, a system that always produces the same results and that hopefully meets or exceeds its specifications. A product is analyzed using the reliability function (or survivor function): the probability of a unit in a system that does not fail in a certain specified time interval. If the unit does fail in a system, it means the end of the unit’s ability to perform the required function. This is determined by the failure distribution function, or the probability of an item failing in a specific time interval.


Calculations involving the common failure rates of various mechanical devices often results in a graph with a bathtub-shaped curve.


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