Hi Ron , I know this has been asked a million times.But I was not convinced by any of the answers submitted so let me ask the expert now. 1. When case is drafted it has a T number ( T-XXX-XXXXX) and when submitted to DOL in the system it gets changed with an A number (A-XXX-XXXX). So when the A number is generated the case is in the DOL's system. 2. Sometime later DOL sends e-mail to the e-mail id mentioned , employer responds and case is "accepted for processing". This is the actual PD. In all cases the PD lags the A number by a few weeks. Question is how does the DOL pick cases for processing ? We see discussions and assumptions here based on DOL moving more or less in a linear fashion based on the A# . Like after September end (A-14273-XXXX) they picked October( A-14274-XXXX) and so on. If DOL would have indeed certified cases based on PD and not A# how does the theory of linear 5 months approval work? Then it should have been 5 months wait time + 3 weeks or 2 weeks or 1 week based on when the employer received and then responded to the PERM. The approval scale would then me extremely haphazard jumping back and forth. But we do see some linearity in approvals most of the time. So does the DOL look at case in a linear fashion based on the Submission date( A number) or Date of Acceptance date( Priority date) ?