客户退回来一批不良品,总共有800pcs,全部都是不良,而且不良项目涉及好几个,有尺寸超差的,有外观缺陷,划伤、脏污、气泡、虚焊之类的,还有缺少零件的......
现在要确定这800pcs里面,每种不良的数量或比例各是多少,全部检查一遍太耗时间,有没有什么合适的抽样方法?
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This guy is lazy,Introduction has not been set