According to the PMBOK® Guide, specifically in the section detailing Project Life Cycles, a Predictive life cycle (also known as " waterfall " ) is one in which the project scope, time, and cost are determined in the early phases of the life cycle.
Plan-Driven Approach: In a predictive life cycle, the project team focuses on defining the product and project scope as clearly as possible at the start of the project. Any changes to the scope are carefully managed through a formal change control process.
Sequential Phases: This life cycle follows a linear sequence where one phase must be completed before the next begins (e.g., requirements, then design, then build).
Certainty and Stability: This approach is preferred when the project requirements are well-understood, the product is well-defined, and there is a high level of certainty regarding the technical execution. The goal is to " predict " the outcome and manage the project against that set baseline.
Why the other options are incorrect:
A. Adaptive: Also known as change-driven or Agile methods. In these life cycles, the detailed scope is defined and approved before the start of an iteration. They are intended to respond to high levels of change and ongoing stakeholder involvement.
C. Incremental: This approach provides deliverables through a series of cycles that successively add functionality within a predetermined timeframe. The focus is on speed of delivery rather than defining all parameters upfront.
D. Iterative: In this life cycle, project scope is generally determined early, but time and cost estimates are routinely modified as the project team ' s understanding of the product increases. Iterations develop the product through repeated cycles.
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