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  1. tgeorge

    Tricks for sample sizing given very low failure rate

    Got a weird question. In trying to minimize cost, we are trying to pre certify a counting machine. Customer requirements are that machine must count all of the data with 99.8% accuracy over its entire life. Fairly strict! Since we are talking only successes and failures this nets...
  2. tgeorge

    University Greenbelt Certificates

    I have noticed a new thing recently, universities are now offering courses on Stat Process Control and various 6 Sigma Tools even as a part of undergrad degrees and professional coursework. Even to the extent of calling them "Greenbelt Certificates in 6 Sigma" and what not. I understand that...
  3. tgeorge

    Crystal Question

    Do crystals, when feeling a CONSTANT (non varying)pressure/force emit a current? I have a suspicion that as the crystal is pressed inwards current will be emitted but will die off. If so, this is the case, where can I read about this variable pressure/voltage relationship of crystals? Very...
  4. tgeorge

    DOE with repeated responses

    Most DOEs I am familiar with involve only looking at 1 response for each test run. Is there any way to incorporate some sort of repeatability test inside each test run's y response?

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