For buyers contracting authority
Pick 72224100 when the deliverable is the plan and the project management for putting a system into operation, not the system itself. The clean test: if what gets accepted and paid for is an implementation roadmap, a migration plan, a go-live schedule, or hands-on project steering of a rollout, this is the code. If the accepted output is working software or integrated infrastructure, that belongs under a development or integration code instead.
The boundary that trips contracting authorities is the parent, Project management consultancy services (72224000). Reserve 72224100 for the planning specifically tied to implementing a system; use the broader parent when the consultancy spans a wider programme without that system-go-live focus.
The sibling 72224200 (System quality assurance planning services) is the other neighbour: that one plans how quality and acceptance will be assured, while 72224100 plans how the system gets stood up. Where a single contract folds planning into a larger delivery, set the primary CPV code by the dominant deliverable, not by the whole bundle.