I was wondering if you would be willing to share some thoughts on good practices for tracking revisions and document numbering for a specific situation. We are working toward ISO accreditation and evaluating our current system of documents, especially SOPs. Our SOPs were originally set up as very topic based documents with a designated SOP number for each. For example, the topic of "Facilities" was broken into 8 separate SOPs which had topics like pest control as an individual document. As the Quality Manager this system does not feel necessary and I would rather see the content in a single document, but I'm not sure how to address the old numbers. Our owner would like to reuse the document number for new content but that seems like it would only add confusion. Any advice or opinions on that would be greatly appreciated.