Steve
May 11th, 2007, 11:44 AM
I believe I know the answer to this question, but I want to see what I can find here. When plotting in Weibull++ one can choose either Type I or II (or both) confidence bounds. Type I is Time and Type II is Reliability. If I have a goal of 99.99% at 10,000 cycles then I would want to choose Type II since my mission time is fixed and I want to see the bounds (particularly the lower one-sided bounds) on the reliability. In other words, with Type I you hold reliability fixed (or choose a value) and see the bounds on time on for Type II you hold time fixed and see the bounds on reliability. Does this make sense?