Imagine a senior leader at your company announces they’re leaving next month. Retirement, a better offer, a personal situation – doesn’t matter why. The question that follows is the one that reveals whether succession planning has been done: who steps in?
In companies that have done this well, there’s a considered answer. Maybe even two or three options at different levels of readiness. In companies that haven’t, there’s a scramble – emergency internal conversations, hasty external searches, months of operational disruption while something important goes unled.
Succession planning is the work that prevents the scramble. It’s the ongoing process of identifying people inside the organisation with the potential to take on critical roles in the future – and deliberately developing them so they’re actually ready when the moment comes. Not a spreadsheet with names on it. Genuine readiness, built over time.
How the Process Actually Works
- Identify the roles that can’t afford a gap: Which positions, if suddenly vacant, would cause real disruption? Start there. Not every role needs this level of planning.
- Assess who has potential: Who inside the organisation could realistically grow into these roles? This usually involves performance data combined with a more structured look at future potential.
- Be honest about what’s missing: What does each potential successor still need before they’re genuinely ready? Overstating readiness just delays the real problem.
- Build actual development plans: Targeted training, mentoring, stretch assignments, cross-functional exposure – whatever closes the specific gap for each person.
- Review it regularly: People change. Priorities shift. A succession plan built 18 months ago and never revisited is probably already wrong about several things.
- Use it when the moment comes: When a critical role opens, execute a managed transition rather than improvising under pressure.
The 9-Box Grid
Most organisations doing succession planning seriously use some version of the 9-box grid. It plots employees on two axes – current performance and future potential – producing nine categories that help leadership have more structured, less subjective conversations about who’s ready for more.
The people sitting in the high performance / high potential corner are the primary succession candidates. The grid also helps identify strong current performers who are well-suited to their existing role but aren’t necessarily the right development investment for senior positions – a distinction that matters when time and budget are limited.
Why Organisations That Do This End Up Better Off
- Leadership transitions happen with a plan behind them rather than as a crisis to manage.
- High-potential employees who can see they’re being invested in stay longer. Succession planning is a retention mechanism as much as a continuity one.
- Senior roles filled internally are faster to execute, cheaper, and tend to produce better cultural fit than external searches.
- Institutional knowledge stays in the organisation instead of walking out with a departing leader.
- Over time, the depth and quality of leadership across the company improves.
Where It Gets Hard
- Assessing leadership potential objectively is genuinely difficult. Most people are more confident in their ability to do it than the results justify.
- Without rigour and external challenge, these conversations can quietly become a favouritism exercise – the same networks, the same faces, cycle after cycle.
- When plans are kept entirely confidential, employees who weren’t included often disengage without knowing why.
- It requires sustained investment over years. There’s no shortcut version that delivers real results.
- Smaller organisations sometimes genuinely lack the bench depth to plan for every critical role internally. Acknowledging that limitation is more useful than overstating the plan’s robustness.
FAQs: Succession Planning
Is succession planning only relevant for senior leadership?
That’s where it’s most often done, but the logic extends to any role whose sudden vacancy would cause meaningful disruption – a key technical expert, a critical client relationship, a function where knowledge is heavily concentrated in one person regardless of their level.
Should employees know they’re being developed for future roles?
There’s no universal right answer. Transparency motivates and tends to retain high-potential employees – people work harder when they can see the organisation is investing in their future. The downside is that employees not selected sometimes disengage or feel passed over. Many organisations use a middle approach: communicating that development is happening without making specific promises about particular roles.
How often do succession plans actually need to be reviewed?
At minimum annually, and more often for the most critical roles. People’s circumstances and readiness change. Business priorities evolve. Organisational structures shift. A plan only looked at once a year for a fast-moving role is almost certainly already behind.
What’s the real difference between succession planning and replacement planning?
Replacement planning is reactive – a role opens, you find someone to fill it. Succession planning is proactive – you’ve been developing that person for two years before the vacancy exists. One manages a crisis after it starts. The other is what prevents the crisis from being a crisis.