Scope Drift Cost Curve

Scope Drift Cost Curve is the pattern where each unpriced client change request compounds, because a roadmap item moved late carries rework, re-sequencing, and re-briefing costs that grow faster than the change itself. Agencies feel this first on retainer work, where the original estimate was priced against a fixed sequence and every insertion pushes downstream tasks into a new dependency order. The framework says: price the change at the moment it is requested, not at the next invoice cycle. A public roadmap makes that possible, since the client sees which item gets displaced. ProdPad's Now-Next-Later structure and ProductPlan's visual timelines both expose that displacement to non-technical stakeholders, while Project Echo's public changelog and Kanban roadmap let SaaS clients watch shipped work accumulate. When a client can see the trade, the conversation shifts from "can you squeeze this in" to "what comes out," which is the negotiation lever the category exists to create.