Minitab's reliability test plans have two main functions. One is to determine the sample size and testing time needed to estimate model parameters. The other is to demonstrate that you have met specified reliability requirements.
A test plan includes:
Use Minitab's reliability distribution analysis commands to understand the lifetime characteristics that are under study.
Use Minitab's warranty analysis commands to analyze historical warranty data and predict the number and cost of warranty claims in the future. Warranty analysis helps you allocate resources to address future product failures adequately.
Use Minitab's growth curves to analyze life data from a repairable system. A repairable system is one in which the parts are repaired instead of being replaced when they fail. Growth curves can show whether a trend exists in times between successive failures of a repairable system and whether system failures are becoming more frequent, less frequent, or remaining constant.
Use Minitab's regression with life data commands to investigate the relationship between failure time and one or more predictors.
Use probit analysis when you apply a stress or stimulus to a number of units and record whether each unit failed or survived. A probit analysis is used to evaluate a binary response variable. The analysis estimates percentiles, survival probabilities, cumulative failure probabilities and draws probability plots. In Minitab, choose.