EDMCS- System Generated request number question

Summary

How are request numbers assigned, what logic?

Content

I note that request numbers appear to be electronically assigned and I'm not sure about the sequencing on numbers. I ask because part of our control process will be to manage requests by users / request numbers. I'd like request numbers to just be in sequential order rather than have gaps in sequence for request numbers.

Example - today I start one request and it gives me request number 4444, next day I start one request and it gives me say 4462 and not 4445.