Cast studies of electronic equipment reliability prediction - comparison between MIL-HDBK-217F and Bellcore TR-332

摘要

MIL-IIDBK-217F has been widely used not only in Japan but also around the world as the most authorized method for reliability prediction of electronic equipments. It is noted that many reliability engineers have preferred Bellcore reliability prediction method TR-332 to 217F, because the predicted values with 2 17F do not always reflect the values observed in the actual field. First, this report makes a comparison between the numerical values of the generic failure rate of various electronic parts based on the two reliability prediction methods. Next, it deals with the case studies of the reliability prediction for two main units of electronic private branch exchange manufactured by TOA Corporation; one is a control unit, the other a power supply unit. Finally, it compares the MTBF values of these two units calculated by 217F with those by TR-332.