We often need evaluating the reliability of entire system in engineering,such as failure rate, MTBF, MTTR, and we must do some caculating and allocating works to satisfy the procedure target.

• 在工程设计中经常要评估产品可靠性方面的指标,如失效率、平均无故障时间、平均维修时间等数值的测算和分配。