Workflow requester as approver

Assume you are a purchase manager who approves both all your company purchases and your team.

But what if you want to place a requisition?

This means, as a requester, you need to both approve your requisition as a manager and then again as a purchase manager.

For this kind of users, there is a generic parameter that helps users not to loose time.

You use workflow parameters and check "Disallow Approver by Submitter".