Design an evaluation framework for an enterprise LLM assistant

Focus on identifying key performance indicators (KPIs) that measure the effectiveness of the LLM assistant in an enterprise context. Consider metrics such as accuracy, user satisfaction, response time, and task completion rates. Discuss how you would gather user feedback and incorporate it into the evaluation process. Additionally, think about how to assess the assistant's impact on productivity and collaboration within teams. Be prepared to explain how you would iterate on the framework based on the evaluation results.