engineer-testable-requirementslisted

# Engineer Testable Requirements Produce one **Requirements Contract** that states what outcome and observable behavior the system must provide without prematurely hiding a design choice inside a requirement. Read [references/requirements-method.md](references/requirements-method.md) before baselining the contract. ## When to use - Needs/requirements must become testable acceptance criteria with oracles and traceability - Ambiguous adjectives (fast, secure, user-friendly) need observable context and boundaries - Not for architecture shape (`decide-architecture-shape`) or user research (`research-user-needs`) ## Method 1. Define the subject, system boundary, lifecycle stage, intended outcomes, stakeholders, users and affected parties, operating contexts, external authorities, assumptions, constraints, and decision owners. 2. Elicit needs from current primary evidence: user research, existing behavior, incidents, contracts, policies, regulations, interfaces, operational data, and stakeholder input. Label observed need, requested preference, inferred need, assumption, and binding constraint separately. 3. Resolve terminology and model contexts, actors, goals, scenarios, state transitions, normal flows, alternatives, failures, recovery, misuse, and lifecycle events. Expose conflicts and missing authorities before drafting. 4. Derive uniquely identified requirements across functional behavior, data, interfaces, quality attributes, safety/security/priva