特此附上Tesco的抽验标准:
S4 sampling will be applied for normal on-site inspection. If visual check and field test on S4 sampling has a non-conformance result, SGS will increase sample size to L1 for the finding and make the final judgment. We would note the change to the sampling level in the report.
If critical defect found, or acceptable major or minor defects number is over the limit as per L1 in S4 sampling, it is not necessary to extend the sample size from S4 to L1.