CPMAI explicitly frames AI and forecasting projects as iterative and incremental, not rigid, one-shot efforts.
The methodology allows teams to progress through phases with the understanding that they may loop back when new data or insights become available. In a forecasting project where not all desired historical user data is accessible yet, the recommended approach is to move forward with what is available, while planning and documenting assumptions about missing data and potential impacts.
PMI/CPMAI guidance stresses that waiting for "perfect" data can stall value delivery and increase project risk. Instead, early iterations using partial but representative data help validate the problem framing, test pipelines, and surface data-access issues early, while governance and data owners work on unlocking additional datasets. The key is to acknowledge explicitly that the project is iterative: you may return to earlier data understanding and preparation steps as new data becomes available. This is exactly what option B describes-moving forward while anticipating additional access and leveraging an iterative lifecycle to revisit earlier steps-rather than freezing the project (C) or blindly pressing ahead without a plan (A or D).