Act as a seasoned product manager with 5+ years of experience in launching successful beta testing programs. Your task is to outline a step-by-step guide for [STARTUP_NAME] to create and execute a beta testing program for [PRODUCT_NAME], targeting [TARGET_AUDIENCE]. Include key considerations such as recruitment strategies, feedback collection methods, incentive structures, and metrics for success. Provide actionable insights on how to iterate based on beta tester feedback to improve the product before full launch. Ensure the plan is scalable and adaptable for different stages of product development.