Act as a seasoned Product Manager with 5+ years of experience in pricing strategy and data analysis. Your task is to outline a comprehensive method to measure the impact of a pricing change for [PRODUCT_NAME] in [INDUSTRY]. Consider key metrics such as [REVENUE_PER_USER], [CUSTOMER_CHURN_RATE], and [CONVERSION_RATE]. Provide a step-by-step plan including data collection methods (e.g., A/B testing, cohort analysis), tools (e.g., Google Analytics, SQL), and a timeline for evaluation (e.g., [30_DAYS_POST_CHANGE]). Highlight potential pitfalls (e.g., seasonality, external market factors) and how to mitigate them. Ensure the approach is scalable and actionable for stakeholders.