A succession plan exists to make sure that when a critical role becomes vacant (planned retirement, surprise resignation, sudden death), the organization has thought through who's ready to step in and what gaps that successor would have. Most companies say they have one. Far fewer have one that's current, complete, and connected to actual development activity. The gap matters because critical-role vacancies happen on bad timing, and a paper succession plan that hasn't been updated in three years is functionally the same as no plan at all when the call comes.
Which Roles Belong in a Succession Plan The right coverage depends on the company, but four categories almost always belong. C-suite roles where founder or executive departure would create immediate continuity risk. VP and senior director roles where decision-making authority is concentrated and the talent pool to backfill externally is thin. Specialized individual contributor roles where deep expertise is hard to replace (lead engineers in proprietary technology, medical directors, head clinicians). And key client- or partner-facing roles where the relationship is personal rather than institutional.
Plans that try to cover every role at every level dilute the focus and rarely get updated. Plans that cover only the CEO miss the operational risks. The right scope falls in between.
How Succession Readiness Is Rated Most succession plans rate each candidate on two dimensions: time to readiness and current performance. The 9-box grid is the most common framework, plotting performance (low, medium, high) against potential (limited, growth, high). The rating drives the development plan. Successors rated ready now usually need limited additional development; successors rated ready in 1-3 years need targeted experiences and visibility; successors rated ready in 3-5 years need substantial development and probably interim roles.
What Makes a Succession Plan Live Rather Than a Document on a Shelf? Three things. The plan gets reviewed at least twice a year with the executive sponsor of each role. The named successors actually receive the development experiences in their plan, not just the assignment to the plan. And the company tracks how often actual succession events draw from the plan versus going outside it, which is the cleanest measure of plan quality.
Common Succession Planning Failures Four patterns show up repeatedly. Plans that name only ready-now successors, with no pipeline beyond them. Plans that ignore diversity by repeatedly naming successors who match the demographic profile of the current incumbent. Plans that don't connect to development plans, so successors are designated but not developed. And plans that get reviewed annually as a check-the-box exercise but never used to inform actual selection decisions when a role opens up. Each failure mode produces a different visible symptom: surprise external hires for roles that should have had internal successors, leadership team demographics that don't change generation to generation, named successors who quit before the role they're being prepared for opens.
Building a Succession Plan That Actually Reduces Continuity Risk Five practices separate functional succession plans from theatrical ones. Define the critical role list explicitly and revisit annually, since which roles are critical changes as the business evolves. Identify a primary plus at least one alternate successor for each critical role, with explicit readiness ratings. Build development plans for each named successor with specific experiences, sponsors, and timelines. Review the plan quarterly at the executive level and twice a year with each sponsor. And pull from the plan when actual openings occur, with deliberate effort to name internal candidates first rather than defaulting to external search. For related concepts, see recruitment , employee retention , and employee engagement . The Bureau of Labor Statistics publishes labor force projections at bls.gov that help anchor multi-year succession planning to realistic external talent availability.
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