Which technique is most effective for a detailed gathering of requirements in a short timeframe?

The technique that is most effective for a detailed gathering of requirements in a short timeframe is stakeholder interviews. This method allows for direct interaction with key stakeholders, enabling the requirement analyst to obtain in-depth information, clarify any ambiguities, and explore complex requirements through dialogue.

In an interview setting, the analyst can ask follow-up questions and delve deeper into specific topics based on the responses received, which can lead to rich, nuanced insights that are often missed in more passive approaches like surveys or document reviews. Additionally, interviews can adapt in real-time based on the stakeholder's responses, making this method particularly efficient for capturing detailed requirements quickly.

Other techniques, like closed-ended questionnaires, can limit responses and may not capture the depth of information needed in a complex environment. Prototyping can be effective for demonstrating ideas but may not be suitable for gathering initial requirements quickly. Document reviews provide valuable historical context but lack the interactive element needed for precise understanding and clarification.