Field Failure Rate: 10 FITS or 1000 FITS?
Tuesday, November 15, 2011Viewed 2136 times
After analyzing field failure data from hundreds of data sets from dozens of sources, it is becoming easy to see why results from different studies may vary by an order of magnitude or more. The data collection process itself varies by an order of magnitude or more! A few questions can show essential differences:
• When is a failure report written?
• What is the definition of failure?
• Are “as found” conditions recorded during a proof test?
• What were the operating conditions?
A few examples:
One extensive set of test results from a manufacturer’s test shop indicated “strong proof” that the manufacturer had an…
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