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Glossary

Scope Creep

Scope creep is the gradual expansion of a project's work beyond what was agreed, without a matching change to the time, budget or commercial terms. It rarely arrives as one big request — it accumulates from small, reasonable-sounding extras — which is why the delivery shape can change completely while the contract stays still.

Scope creep is what happens when the work a project is expected to deliver grows beyond what was originally agreed, but the time, budget and commercial terms do not grow with it. It is one of the seven places drift hides — the book calls it commercial drift — and it is among the most expensive, because it is paid in margin that nobody ever decided to give away.

The defining feature of scope creep is that it does not jump; it creeps. A half-hour of extra advice on Monday, a supportive call on Wednesday, an "easy" extra feature on Friday. Each request is small and reasonable, and saying yes feels like good service. By the end of the month the delivery shape has changed materially while the commercial shape has not.

Why it matters

Scope creep is common and quietly damaging. The Project Management Institute's Pulse of the Profession research has reported that around half of projects experience scope creep — and because the cost is absorbed in extra hours rather than a single invoice, it rarely appears as a line anyone can point to. It also erodes trust: the team feels taken for granted, and the client comes to expect the extras as standard.

How to control it

You do not stop scope creep by refusing every change — you stop it by making each change visible and decided. Three habits do most of the work: a clear definition of done so everyone agrees what the original scope actually was; a running test, "is this still covered by the agreed arrangement, and if not, who has flagged it?"; and the discipline of converting an absorbed extra into a named decision — a small change request — rather than a quiet favour. Flagged early, scope creep becomes a visible decision about price or time instead of an invisible leak.

Frequently asked

What is the difference between scope creep and gold plating?
Scope creep is work expanding because of outside requests — a client or stakeholder keeps asking for more. Gold plating is the team adding extras nobody asked for, usually to impress or out of perfectionism. Both inflate the work beyond what was agreed, but the source differs, and so does the fix.
How do you prevent scope creep?
Agree a clear scope and definition of done up front, then route every new request through a visible change process rather than absorbing it quietly. The aim is not to refuse changes but to make each one a named decision about price or time, so nothing expands by default.
Is scope creep always bad?
Not necessarily. A change that adds genuine value can be worth accepting — the problem is only when it happens invisibly, without a matching adjustment to time, budget or terms. Scope creep becomes damaging precisely when nobody decides to allow it.

Related

Term

Drift (Operational Drift)

Drift is what happens when work slides sideways from where it should be while everyone stays busy — dates slipping, decisions waiting, dependencies going quiet, scope creeping. It is gradual and individually small, which is why it goes unnoticed until it surfaces as a surprise.

 Guide

The Seven Places Drift Hides (and How to Spot Each One)

Drift hides in seven predictable places: decisions, dependencies, dates, cadence, stakeholders, commercials, and ownership. Each is a lens — a question you run over a piece of work to find where uncertainty is quietly eating the outcome. Drift under a load-bearing pillar is a crisis forming; drift elsewhere is usually a mild fact.

 Term

Definition of Done

A definition of done is an agreed, shared checklist of the criteria a piece of work must meet before it counts as finished — not just "code written" but tested, reviewed, documented and shippable. It removes the ambiguity that lets half-finished work get called "done".

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