Enter information to develop plans for a test to demonstrate that only a certain number of failures occur in a set amount of test time. Planning information may come from design specifications, expert opinions, small pilot studies, or other sources.
Each combination of maximum number of failures allowed and sample size or testing time creates one test plan. You may want to create several test plans by entering multiple values for each property and then compare the results.
If your estimate of the parameter is incorrect, then the sample size or the testing time for the test plan may not be accurate. If you are unsure of the parameter value, consider repeating the test plan analysis using a range of likely values for the assumed parameter. The results from the different analyses can help you to determine how sensitive the sample size or testing time is to the assumed parameter.