This paper is concerned with the maintainability task selection procedure and the test methods for maintainability verification. Two basic approaches, stratification and simple random sampling, are introduced and illustrated through an example. Also suggested and illustrated are test methods for the mean corrective/predictive maintenance time as well as the mean corrective/predictive maintenance time and the maximum value of a percentile of maintenance time. This paper is expected to contribute to the understanding of domestic enterprises for the maintainability verification concept and test methods.