phasebuilding

Phasebuilding is a project delivery approach in which a project is constructed in distinct, time-bound phases. Each phase aims to produce a usable increment or set of capabilities, and subsequent phases are planned and funded based on the results and learnings of earlier ones.

Key elements of phasebuilding include phase gates or milestones, formal reviews, and governance practices to approve progression. Planning emphasizes alignment with strategic objectives, defined acceptance criteria for each phase, and the ability to reallocate resources between phases as needed. The approach favors iterative learning, risk assessment at each stage, and transparent decision-making about continuing, modifying, or stopping the project.

The typical process begins with scoping and the design of the phase structure, followed by execution of each phase under defined constraints for scope, budget, and schedule. After each phase, a formal evaluation and gate decision determine whether to proceed, adjust the plan, or halt the project. This creates a structured feedback loop that can adapt to new information and changing circumstances.

Common contexts for phasebuilding include construction projects that add facilities in stages, software or IT implementations delivered module by module, urban development programs that open neighborhoods progressively, and research initiatives with staged milestones. The approach is often used when high upfront risk exists, when early value is desirable, or when resources need to be managed across uncertain timelines.

Advantages include improved risk management, early value delivery, clearer stakeholder engagement, and more flexible budgeting. Challenges can include longer overall timelines, governance overhead, potential misalignment if phase criteria are poorly defined, and integration risks between phases. Phasebuilding is related to concepts such as stage-gate, phased rollout, and incremental delivery.