You can pick any numbers you want, or no numbers at all.
Some use letters with numbers, such as:
QC-SP-001 . This means it is issued by the QC dept.- QC -Standard Procedure-001, PD for production, PC for Production Control, PH for Purchasing, etc.
You don't have to use any numbers, you can use names of the procedures. Just keep track of the date when they were issued, who approved them, and the revisions and dates. Hope this helps
I guess we all posted at the same time