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Builders need clarity on what to build and which things matter the most. So we need to make sure they have simple listed priorities, and clear requirements so the team can plan and do the work. We’re not aiming for perfection. That isn’t possible. Instead we describe and explain any uncertainty up front. While the team is working inside an iteration, priorities should stay reasonably stable so the builders can finish without constant interruptions. And outside the iteration, the priorities can change.

Customers do not have the right to insist on fixed scope on an immovable date. They do have the right to manage the schedule by changing scope. The most important right here is the right to know—timely visibility that a date is at risk so informed trade-offs can be made. Honoring this right enables change to become a competitive advantage, not a project’s undoing.

Because value is delivered in working, tested increments, customers may stop at any time and still retain a useful system that reflects the investment to date. This is only possible if: Every iteration ends with integrated, shippable software. Documentation, telemetry, and operational handoffs keep the system usable without the team.

Keep change affordable: Short iterations and small stories: Reduce the blast radius of any decision. Continuous integration and delivery: Keep the product always releasable so swapping scope is easy. Automated tests and refactoring: Make code safe to change; the test suite proves we didn’t break value already delivered. Modular architecture and clear seams: Localize change instead of rewriting the world. Feature flags and branch-by-abstraction: Enable gradual rollouts and safe reversals. Backlog hygiene and ROI-driven ordering: Replace lower-ROI work with higher-ROI work at minimal switching cost. WIP limits: Less inventory in flight means less rework when priorities shift.

Software is meant to change. Customers have the right to change their minds, substitute functionality, and re-order priorities without paying exorbitant costs. Agile assumes change and designs both the product and the process to make change economically reasonable. What “reasonable, not exorbitant” means: Change isn’t free; it should be cheap enough to make good business sense. Costs are kept low by technical excellence and small-batch planning, not by refusing change.