A team was hired to develop a next generation drone. The team created a prototype and sent it to the customer for testing. The feedback collected was used to refine the requirements. What technique…

Early requirements gathering is not a recognized PMBOK technique and does not describe the iterative, prototype-based refinement process shown in the scenario.

Feedback analysis is not a formally defined project management technique in the PMBOK Guide, and does not capture the iterative prototype cycle described.

Progressive elaboration is the iterative process of increasing the level of detail in a project plan as more information becomes available and requirements are better understood. Using a prototype to elicit customer feedback and then refining requirements based on that feedback is a textbook example of this technique. It acknowledges that requirements are not fully known at project start and are developed incrementally through customer interaction.

Requirements documentation is an output artifact that records requirements, not a technique for eliciting or refining them through iteration.