Exceeding the AQL Limits in the 100% visual Inspection

目视全检中超出AQL限度

Nowadays it is state of the art, that manual inspection of random AQL samples is part of the 100% visual inspection. The results are taken into consideration as part of the batch release process. But what happens when the batch fails the AQL test, i.e. the limit has not been adhered to? In this event, it is useful to carry out another 100% visual inspection on the entire batch and do a second AQL inspection. Tighter limits are recommended for the second AQL test. This can be achieved in two ways:

现在理想的要求是将随机AQL样本人工检查作为目视全检的一部分。在批放行过程中要考虑这些结果。但是如果某批AQL测试失败，即达不到限度要求，又会怎样呢？在这种情形下，有必要对整批进行另一次目视全检，进行第二次AQL检查。在第二次AQL测度中，建议采用更严格的限度。有两种方法可以达到此目的：

1. Retain the AQL sample number and use the next tighter AQL limit or
采用相同的AQL样品数，使用下一个更严格 的AQL限度，或者

2. Retain the AQL limit and use the next higher number of samples.
采用相同的AQL限度，使用下一个更大的样本数

In any event, the number of possible repetitions of the test must be specified. The ECA Best Practice Guide recommends a maximum of two repetitions. All of the repetitions must be recorded in the batch documentation.

无论如何，测试中可能重复的数量要指定。ECA最佳规范指南中建议两次重复的最大数量。必须在批文件中记录所有重复测试。

Another frequently asked question in this context is whether the samples for the AQL test can be returned to the batch after a successful test. As a rule, there is no reason why not. The only requirements are that the AQL test must be carried out in the same rooms as the visual inspection of the batch and that the batch remains in the room during the subsequent AQL testing.

此时另一个常见问题是如果测试通过，AQL测试的样品是否可以放回批产品中。作为原则，没有理由不可以放回去。只有一个要求就是AQL测试必须在该批次目视检查的同一个房间内进行，批次在随后的AQL测试中还保留在该房间内。