Scope Creep Is Not a Planning Failure. It Is a Politics Failure. Is Agile the Solution?
Change control exists. Everyone knows it. Scope still creeps.
The process isn't the problem. I've sat in rooms where the change control documentation was thorough, the intake form was clear, the approval chain was documented. And then a VP walked in on a Tuesday and described a feature that was definitively not in scope, and by Thursday the team was building it. No CR. No impact assessment. No formal approval. Just gravity. Here comes another golden calf.
This is what the literature gets wrong. The PMBOK frames scope creep as a process deficiency — inadequate requirements gathering, poor change control discipline, insufficient baseline documentation. Fix the process, fix the problem. I find that framing arresting in how completely it misses the actual mechanism.
Scope creep isn't a process failure. It's a power failure.
The change control process works fine when the person requesting the change has equal or lesser organizational authority than the people who have to absorb the cost. It stops working the moment someone with budget authority — or proximity to budget authority — decides the process is optional for them. And here's the structural problem: the people who pay the cost of that uncontrolled change (analysts, developers, QA) are almost never the people with standing to invoice it back up the chain.
The PMI's own research in the Pulse of the Professionreports consistently shows scope creep as a top driver of project failure. What that research doesn't trace explicitly is who initiates the creep. In my read of how these failure patterns actually play out, the undocumented requirement almost always has a senior sponsor attached to it. The team didn't forget to write a change request. They were never in a position to enforce one.
Jeff Sutherland and Ken Schwaber designed the Scrum framework partly as a structural answer to this — the sprint backlog is locked, the Product Owner controls the gate, scope changes wait for the next sprint. Clean in theory. But Scrum doesn't solve for the executive who calls the Product Owner's manager. The sprint boundary is only as hard as the organizational culture that enforces it.
The honest conversation teams need to have isn't "how do we improve our change control process." It's "who in this organization can actually say no to a VP, and are they on this project."
If the answer is no one, the change log is a document. It is not a defense.