Succession planning is a near-universal HR practice and an inconsistently effective one. The annual cycle produces a slide for each critical role with named candidates at varying levels of readiness, the slide gets reviewed by leadership, and the actual departures happen against a different reality than the slide described. The gap between plan and reality is usually not the planning itself — it is the absence of operational discipline that turns planning into readiness.
Identification Is Not the Hard Part
Most succession plans are reasonable at identifying critical roles and naming candidates with potential to succeed. The harder discipline is acting on the identification — building development plans for each candidate that close the readiness gap before it is needed, providing actual assignments that develop the right capabilities, surfacing the candidates to the broader leadership so they have the visibility a successor needs, and revisiting the plan as candidates and roles change.
Three Categories of Successor Readiness
"Ready now" — could step into the role with limited transition support, performing competently within months. "Ready 1-2 years" — needs specific experience, exposure, or skill development before stepping in. "Ready 3-5 years" — high potential, but requires substantial development. Each category implies different talent management actions. Ready-now candidates need retention attention; ready 1-2 candidates need targeted development plans; ready 3-5 candidates need broader stretch experiences. Plans that treat all named successors equivalently miss most of the operational value.
The Bench Strength Problem
A critical role with no internal successor is a single point of failure. A critical role with one ready-now successor is better, but that successor may not stay or may not be available. Mature succession programmes target multiple successors per critical role at varying readiness levels, recognising that any individual successor may leave, decline, or no longer fit when the role becomes available. Planning for bench depth rather than single-name succession is what produces resilience under realistic departure patterns.
A pattern in failed successions: the named successor on the slide leaves before the incumbent does. The succession plan was technically correct at the time it was made; it failed because the successor's development plan never produced the experience, the visibility, or the explicit intent to retain that would have anchored them to the organisation. Succession planning that does not include retention strategy for named successors regularly produces this outcome.
Critical Roles Beyond the C-Suite
C-suite succession gets most attention, but the operational risk of unplanned departures often concentrates one or two layers down — senior individual contributors, technical specialists, single-point-of-knowledge roles. A senior engineer whose departure would jeopardise a major product. A compliance officer who is the only person who understands a specific regulatory regime. A relationship manager who holds the key customer relationships in a region. Succession planning that stops at the executive layer leaves these critical mid-organisation risks unaddressed.
Practical Components That Move Plans Into Action
- Critical role identification covering executive and key non-executive positions
- Multiple named successors per role with calibrated readiness assessment
- Specific development plans for each successor, with assigned actions and accountable owners
- Stretch assignments that develop the actual capabilities the successor will need
- Visibility opportunities — board exposure, executive presentations, cross-functional projects
- Retention attention for ready-now successors disproportionate to the rest
- Annual review of the plan against actual departures and readiness movement
The Test That Matters
The honest test of a succession plan is what happens during an unplanned departure. The named successor steps in and performs within the expected window, with the development that the plan said had been completed actually being in place. Plans that pass this test are operating; plans that consistently produce surprises during real departures are documentation. The discipline difference is not subtle — and the cost of unplanned departures into a failed succession plan is high enough that the operational investment pays back across multiple departures over time.