Glossary

Scope Creep

The gradual expansion of what a project is expected to deliver, without matching adjustments to budget, timeline or the original approval. Not one bad decision, an accumulation of small reasonable ones.

Nobody approves scope creep. They approve a sensible addition, then another, and eighteen months later they are funding a programme the investment committee never saw.

Last reviewed 3 July 2026 · Free and ungated

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Naming the phenomenon

Scope creep is the incremental growth of a project's deliverables, requirements or ambition beyond what was originally agreed, without the budget, schedule and approval being formally revisited. It differs from a managed change: the change is visible and decided; creep accretes below the threshold of decision.

Why small yeses compound into a different project

Each addition passes the local test: it is genuinely useful, it is small relative to the whole, and refusing it feels obstructive. What no individual yes triggers is the global test, whether the project as now constituted would still have been approved at its current cost, duration and risk. Creep is also rarely innocent on both sides. Suppliers on time-and-materials welcome it; internal teams use a funded programme as the vehicle for every wish that could not win its own budget. The result reaches steering as a delay or an overrun, when the true event was that the decision itself changed and nobody re-made it.

Conditions that invite it

  • A statement of work that describes intent rather than boundaries, so nothing is ever clearly out.
  • Change control that only triggers above a monetary threshold, exempting the steady accumulation beneath it.
  • A sponsor too distant to notice the delta between what was approved and what is being built.
  • A fixed go-live date treated as sacred while scope stays negotiable, guaranteeing the collision arrives late.

Would today's version of this project have been approved? Ask now, not at overrun.

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