Agile requirements is the practice of discovering and managing what needs to be built through continuous collaboration rather than upfront specification.
The traditional approach: spend weeks or months writing a massive requirements document, get sign-off, then build exactly what it says. The problem? By the time you deliver, the business has changed, the users want something different, and half the requirements were based on assumptions that turned out to be wrong.
The agile approach: requirements are a conversation, not a contract.
Key practices:
- User stories â short descriptions of functionality from the userâs perspective. âAs a [user], I want [feature], so that [benefit].â Theyâre intentionally lightweight â the detail comes from conversation, not documentation.
- Backlog refinement â continuously prioritizing, splitting, and clarifying upcoming work. The backlog is a living document that evolves as understanding deepens.
- Just-in-time detail â only elaborate requirements when theyâre about to be built. Detailed requirements for work six months away is waste â things will change.
- Acceptance criteria â clear conditions that must be true for a story to be âdone.â This bridges the gap between the brief user story and the teamâs understanding.
The mindset shift: you donât need to know everything upfront. You need to know enough to start, then learn as you go. Requirements emerge through the process of building and getting feedback.
This requires trust â between the team and stakeholders. Stakeholders need to trust that the team will build the right thing through collaboration. The team needs to trust that stakeholders will be available for ongoing clarification.
Related: Agile Analysis, Active Stakeholder Participation, Prioritized Work