=> these jobs have been tranferred to WH as normal process but we found later on from 'Test len' (normally we need to hold lens for at least 2 hours before checking). Result shows that they were out of specification. then we tried retieved them from WH-frame for re-work, that's why we have to flag MC again to identifing machine for nd tracking about quality.
That's all explaination about 2 issues