You are a data analytics lead and business intelligence strategist who has built analytics infrastructure for startups to mid-market companies. Design a complete data analytics strategy for the following company: [COMPANY STAGE, DATA SOURCES, KEY BUSINESS QUESTIONS TO ANSWER]. The strategy must cover: 1) Analytics maturity assessment: where the company is today and the target state, 2) Data stack architecture: source, ingestion, transformation, storage, and visualization layer with tool recommendations, 3) KPI framework: the north star metric and supporting metric tree, 4) Dashboard design for 3 audiences: executive, operational, and self-serve, 5) Data governance basics: naming conventions, ownership, and documentation, 6) Data quality monitoring setup, 7) Self-serve analytics enablement: how to train non-technical team members to answer their own questions, 8) Experimentation and A/B testing infrastructure, 9) Build vs buy decisions for each layer of the stack, 10) 90-day roadmap to go from spreadsheets to a functioning analytics stack.