Should I separate this data?

Asking for a best practice: I admin a vault of engineering drawings and misc supporting files like .xls and word docs, some images. And I have a MS Excel spreadsheet for tracking the users and the related data in PDM. I'm thinking of putting the user data from that spreadsheet into PDM itself. And I'd even create a simple workflow so a lead from a department can use an Info Card and submit for a new user - instead of me tracking the data in a spreadsheet, the leads from departments can initiate the "request" and populate most of the data. But I'm puzzled if the data should be in the same vault? Or should I separate it into another vault? Your thoughts?

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