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by Fred Schenkelberg 7 Comments

4 Different Types of Reliability Testing

4 Different Types of Reliability Testing

Getting the Right Information from Your Reliability Testing

You cannot test in reliability any more than you can test in quality. Often reliability testing is done though, and knowing the range of testing approaches and their associated results will help you get the most information from each test conducted.

Let’s explore the types of testing that generate information useful as you develop a reliable product. There are 4 different types of reliability testing:

  1. Discovery
  2. Life
  3. Environmental
  4. Regulatory

Within each type there are many variations to the testing details and the specific results generated. Understanding the questions each type of testing has the capability to resolve is a good first step to implementing the right set of tests for your project. [Read more…]

Filed Under: Articles, CRE Preparation Notes, Reliability Testing Tagged With: Environmental Testing, Highly Accelerated Life Test, Life Test, Reliability test planning, Reliability Testing, tests

by Fred Schenkelberg 5 Comments

Life Testing Question

Life Testing Question

Hi Fred,

I would take this opportunity to ask the reliability guru about bathtub curve for hardware reliability. I am running 27 units for life test for a million cycles around 555 hours. I have one failure at 300,000 cycles, and the rest of the units are running fine. Would this be classified as an early life failure? Also, how do I make a determination of when the early life failure time interval ends and constant failure rate starts in this example based on failure rate of remaining units? Thanks. [Read more…]

Filed Under: Articles, CRE Preparation Notes, Reliability Testing Tagged With: failure mechanism, failure mechanisms, Failure Rate, Life Test

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