5. Market phase
The market as a permanent teacher.
"The difference between an organization that learns and one that doesn't isn't in the quality of its ideas. It's in the speed at which it converts market reality into system improvements."
What it is: The continuous process of capturing, interpreting, and acting on market signals to keep the Context Document aligned with reality. It is not a validation phase — it is a permanent learning regime.
Who participates: Product Lead (signal interpretation), Context Engineer (context updates), Data Lead (measurement systems), stakeholders from Phases 1-2 (strategic reviews), support and sales representatives (qualitative signals).
What questions it answers: Is the Problem Statement still the most accurate description of the problem? Are the KPIs measuring what truly matters? What did the market reveal that no amount of prior discovery could have anticipated?
What it produces: Signal Log (market evidence), Context Update Record (change traceability), Iteration Brief (cycle-to-cycle bridge), KPI Dashboard (real-time system state), and an increasingly precise Context Document.
When it's complete: It doesn't end. Phase 5 is the permanent regime in which the product and its governing context live. What varies is the intensity of intervention, not the continuity of observation.
Why
Phase 5 exists so the market stops being a silent judge and becomes a permanent teacher. Without it, the Context Document freezes at the moment of launch.
Learning spiral
Phase 5 is not the end of the methodology. It's the transition from a linear cycle to a learning spiral where each turn produces a more precise Context Document.
What it is
Market Phase is a continuous process of capturing, interpreting, and acting on market signals. It is not hypothesis validation, user feedback collection, or a sprint cycle.
Market signals
Not all market signals have the same value. The core skill of Phase 5 is reading the right data the right way and translating it into Context Document updates.
Automation
Phase 5 is progressively automated: from instrumented observation to a learning system. The precision of the Context Document determines how much automation is viable.
Context Debt
Context Debt in Phase 5 occurs when the market sends change signals and the Context Document doesn't incorporate them. It's not technical — it's semantic.
Who
Phase 5 is not an isolated product process. It's the continuation of the organizational consensus built in Phase 2. Stakeholders from Phases 1 and 2 actively participate.
Living context
A mature Context Document — one that has survived twelve months of Market Phase — contains the deepest understanding available about the problem, the solution, and the context in which both operate.