Two new methods have been put forward to estimate the reliability characteristic parameter . a software package has been developed to process the data obtained from reliability testing for electric apparatus . it consists of both the determination of failure distribution and the estimation of reliability characteristic parameter 最后，设计出电器可靠性试验数据处理软件包，此软件包含了产品失效分布类型的确定和可靠性试验结果为大子样、小子样、无失效数据时可靠性特征量的估计方法，以及恒定应力加速寿命试验数据下的可靠性特征量的估计方法。
