A workshop is a technique that helps to facilitate a structured and collaborative discussion among a group of stakeholders on a specific topic, such as the impact of the requirement changes. A workshop can help the BA to obtain a resolution on the impact of the requirement changes by providing an opportunity for the stakeholders to share their views, concerns, and suggestions, to analyze the pros and cons of the changes, to negotiate and resolve any conflicts or disagreements, and to reach a consensus on the best course of action. A workshop can also help the BA to communicate the rationale and benefits of the changes, to obtain feedback and approval from the stakeholders, and to document the outcomes and action items of the discussion. A focus group is a technique that helps to elicit the opinions, preferences, and feedback of a group of stakeholders about a specific topic, such as a prototype or a solution option. A focus group can help the BA to understand the stakeholders’ perception, ideas, and attitudes, and to identify any issues, gaps, or improvements, but it does not help the BA to obtain a resolution on the impact of the requirement changes. An interview is a technique that helps to elicit information from an individual stakeholder or a small group of stakeholders by asking open-ended, closed-ended, or probing questions. An interview can help the BA to gather detailed and specific information, to clarify and validate the requirements, and to build rapport and trust with the stakeholders, but it does not help the BA to obtain a resolution on the impact of the requirement changes. A survey is a technique that helps to collect quantitative or qualitative data from a large number of stakeholders by using a predefined set of questions or statements. A survey can help the BA to measure the level of satisfaction, agreement, or importance of the stakeholders, to identify the trends and patterns of the data, and to support decision making and prioritization, but it does not help the BA to obtain a resolution on the impact of the requirement changes. References: BABOK Guide v3, Chapter 10: Techniques, Section 10.53: Workshops, p. 570-572; Section 10.24: Focus Groups, p. 532-533; Section 10.25: Interviews, p. 534-536; Section 10.46: Surveys or Questionnaires, p. 560-562.