任何工业企业的产品质量有时出现波动,原因不外两个:一是未知其形成规律,使疵点得以乘人不备而出现。对此,唯一对策应是加强攻关,以期解开这个未知数,做产品质量的主人。二是已知其形成规律,也有防范疵点的措施和制度,但由于疏忽或不注意量变的累积影响以致重蹈覆辙,对此唯 The quality of products of any industrial enterprise sometimes fluctuates for two reasons: First, it is unknown that its formation rules will make it possible for people to take advantage of people’s unpreparedness. In this regard, the only countermeasure should be to strengthen the research, in order to solve this unknown, to be the master of product quality. Second, it is known that its laws of formation and measures and systems for preventing defects, but due to negligence or inadvertent attention to the cumulative effects of quantitative changes, the same mistakes are made.