A Succession Depth Grid is a strategic tool used to identify and mitigate key-person risk within an organization. It maps roles based on their criticality (e.g., revenue, compliance, IP) and the availability of ready successors (bench depth: zero, one, or two). This information is often visualized as a RAG (Red, Amber, Green) heat-map, where "Red" indicates a critical role with no bench depth, "Amber" indicates medium risk, and "Green" signifies sufficient succession. Through quarterly drills, companies prioritize moving "Red" roles to "Amber" or "Green" via cross-training, shadowing, or external recruitment, thus preventing valuation drops linked to single-person dependencies.