ABSTRACT
A reliability engineer at a bearing manufacturing firm wishes to calculate the testing time that is required to assess the reliability of a new bearing, which is about to be launched in the market. The historical reliability standard for bearings produced by this firm has been “no more than 5% failures in one year of continuous use, which is 8760 hours.” The firm has conducted prior studies on similar bearings, and believes that the “time to failure” distribution for the new bearing is Weibull, with a shape parameter of 3.
