From: Stan Hilliard
Date: 01 Jul 2003
Time: 17:07:18
Bob said: "... multi-million dollar piece of equipment when the sample size is 1 and the test period runs for about 6 years."
That is a tough one. With n=1, you cannot test for random item-to-item variability. Is the tested equipment the same item as the one that has to perform? Is it like burn-in. Is there a wearout issue?
What is the equipment, and what is the nature of failure?