在生产工艺一定的情况下,影响产品质量的因素有五个方面:人员、设备、操作方法、原材料和环境,由于上述因素的不稳定,造成产品质量的波动性。在生产中,通常采用极差X—R管理图对产品质量进行管理,极差X—R管理图是一种基本的质量管 In the case of a certain production process, there are five factors that affect the product quality: personnel, equipment, operation methods, raw materials and environment, resulting in the fluctuation of product quality due to the above factors. In production, the product quality is usually managed with a very poor X-R management chart, which is a basic quality control