以前的产品设计,历来是重视性能指标,对可靠性寿命特征极少考虑,加上我国在可靠性工作方面的落后,元器件的失效率手册没有问世,修正系数的选取方法没有标准化的模式,这些客观原因给可靠性设计带来了困难,造成研制出的产品性能指标虽然满足要求,但可靠性与稳定性差,带来经济损失、信誉受影响的恶果。 In the past, product design has always been to pay attention to performance indicators, seldom consider reliability life characteristics, coupled with China’s backwardness in the reliability of work, component failure rate manual has not come out, the correction coefficient selection method does not have a standardized model, These objective reasons have brought difficulties to the reliability design, resulting in the product performance index developed to meet the requirements, but the reliability and stability of the poor, bringing economic losses, the credibility of the consequences.