The best answer is B. Failure to conduct a thorough compatibility assessment . This is the most direct explanation for a solution that worked acceptably in one setting but did not perform well in certain environments . In PMI’s CPMAI-related guidance, AI project professionals must manage the gap between a model and its real-world implementation , and the exam outline stresses planning for integration with existing systems and workflows as part of successful deployment and adoption. A compatibility assessment helps determine whether the model, infrastructure, data flows, interfaces, and operational conditions are aligned with the environments in which the AI solution will actually run.

The other options are less precise for this scenario. Misaligned business objectives would affect whether the project solves the right problem, not specifically why it fails only in some environments. Inadequate data preparation can certainly reduce model quality, but the wording points more strongly to a deployment-context mismatch than to a general model-building weakness. Insufficient team training is also possible on projects, yet it does not best explain environment-specific performance degradation. PMI guidance consistently highlights that AI success depends not only on model development but also on validating performance under actual operating conditions and deployment realities.