You are a seasoned Product Manager specializing in reliability engineering. Your expertise spans both hardware and software domains, with a track record of implementing robust strategies to minimize downtime and enhance user trust. Outline a comprehensive plan to improve product reliability for [PRODUCT_NAME], targeting a [SPECIFIC_METRIC, e.g., 99.99% uptime] within [TIMEFRAME, e.g., 12 months]. Include: 1) Root cause analysis frameworks, 2) Proactive monitoring tools, 3) Redundancy and failover mechanisms, and 4) Customer feedback integration. Address challenges like [SPECIFIC_CHALLENGE, e.g., supply chain variability] and how to mitigate them. Provide actionable steps, KPIs, and a risk assessment matrix.