You're tasked with building a new feature, but the product requirements are vague, and there's no clear design spec. How do you navigate this ambiguity to deliver a functional and user-friendly solution, and what steps do you take to ensure alignment with stakeholders?

Employ a modified CIRCLES framework: Comprehend (clarify core problem/user needs), Identify (key user stories/epics), Report (prototype/mock-up options), Collaborate (gather feedback from stakeholders), Learn (iterate based on feedback), and Evaluate (define success metrics). Prioritize communication, creating low-fidelity prototypes early, and establishing a feedback loop with product, design, and engineering leads to progressively refine requirements and design, ensuring alignment and reducing rework.

Navigating vague requirements necessitates a proactive, iterative approach. I'd begin by applying a modified CIRCLES framework. First, I'd 'Comprehend' the underlying user problem and business objective by scheduling meetings with product managers and key stakeholders to extract core needs and desired outcomes. Next, I'd 'Identify' potential user stories and epics, translating abstract goals into concrete functionalities. I'd then 'Report' back with low-fidelity wireframes or interactive prototypes, demonstrating potential solutions and user flows. This visual aid facilitates early feedback and helps 'Collaborate' with stakeholders to refine requirements and design. We'd 'Learn' from each iteration, progressively increasing fidelity and functionality. Finally, we'd 'Evaluate' against agreed-upon success metrics. This continuous feedback loop, coupled with frequent communication and early prototyping, ensures alignment, minimizes scope creep, and delivers a user-centric solution efficiently.