If multiple shipments of the same product are schedule, the random testing should occur throughout the shipping cycle. Often, the initial shipment is good, but subsequent shipments have problems.

• 如果确定了同样产品分多次装运出货时间表,随机测试应该贯穿发生在出货周期中。因为经常会发生:最初的出货是好的,但是后来的出货有问题。