In PPM approach, generally, there are two kind of work type. Projects and Small Works. Projects are design with PFM-Project, Small Works are design with only Request. In addition to that you can grade Projects as (example) Big projects, Small Projects. But still you must use PFM-Project in design.
If I were you first I separate work types. For example, If a work is executing as project you must create PFM-Project. So, there is no jargon as "integrate a workflow to project management"
Is it clear?
IT Governance Professional & PPM Solution Architect