If I have an issue that causes a failure at a rate of, say, 1 in 20 cycles and then deploy a fix, how do I work out how many test cycles to perform to be confident to 95% that the fix worked?
I know this is possibly straightforward but I can't find the right thing when searching!
Edit: Trying to re-phrase and add more detail.
Assume that the fix is supposed to be a full fix (i.e. stop the issue occurring again). I am trying to work out how many cycles to perform without a failure to be, say, 95% certain that the issue is fixed and not just that it is not seen as I did not run enough cycles.