R
I too have a sample size question.
we are working on a PCB in a medical device that has a fuse that blows during power up.(not always the first power-up) we have a population of 30 devices and during the build and test of these devices they are powered up approxiamately a dozen times. During the build of this population we have seen 9 occurrances of 'blown fuse'. we are increasing the rating of the fuse and would like to prove that the issue is resolved. currently, i only have four device left that can be used for testing for this condition. how would I determine how many trials (power-cycles) i should perform on each of the remaining four devices to prove the issue has been 'fixed'?
we are working on a PCB in a medical device that has a fuse that blows during power up.(not always the first power-up) we have a population of 30 devices and during the build and test of these devices they are powered up approxiamately a dozen times. During the build of this population we have seen 9 occurrances of 'blown fuse'. we are increasing the rating of the fuse and would like to prove that the issue is resolved. currently, i only have four device left that can be used for testing for this condition. how would I determine how many trials (power-cycles) i should perform on each of the remaining four devices to prove the issue has been 'fixed'?