A critical role can become vacant without much warning. A leader may resign, a specialist may retire, a key employee may move to another function, or the business may expand into a market that needs capabilities it does not yet have. When the search for a successor starts only after the vacancy occurs, the transition can be expensive and disruptive.
Succession planning reduces this risk by identifying the roles that matter most to continuity, assessing the capabilities they require and deliberately preparing people who could take them on. It is not a promise of promotion. It is a way to make talent development intentional and to avoid resting the organisation’s future on informal assumptions.
Start with critical roles, not seniority alone
Many organisations begin by listing their most senior positions. Senior leadership roles are often critical, but they are not the only ones. A technical specialist, plant operations lead, key compliance role or customer-facing expert may hold knowledge that is hard to replace quickly.
The first step is to examine continuity risk:
- Which roles have a disproportionate impact on safety, customer commitments, revenue, regulatory obligations, operational knowledge or strategy?
- What would happen if the person left tomorrow?
- How long would it take to rebuild the capability?
These questions separate a genuinely critical role from one that is simply prominent in the hierarchy.
Define what readiness really means
Potential alone is not readiness. A high performer may deliver strong results in the current role but have limited experience leading a larger team, managing budgets or making decisions across functions. A clear role profile should describe the outcomes, judgement, relationships and capabilities the future position requires.
Readiness categories, such as ready now, likely ready in one to two years, or longer-term potential, are useful when backed by evidence and revisited regularly. They should never become permanent labels: business priorities change, people develop at different rates and career interests shift.
Succession discussions should also acknowledge uncertainty. For highly critical roles, prepare more than one possible successor and identify external hiring or interim-cover options where internal readiness is limited.
Turn potential into practical development
Development plans should close the gap between current capability and future role requirements. Formal training helps, but experience is often just as important. Depending on the role, development may include leading a cross-functional project, taking a temporary assignment, presenting to senior leaders, handling a complex customer issue or mentoring a colleague.
Stretch assignments need clear objectives and support. They should not simply hand extra work to a high-potential employee without the authority, feedback or time to learn. Managers should review progress and discuss what was learned, what remains difficult and which experience should come next.
Succession planning should not narrow development to a small, closed group. Transparent career pathways and broader talent reviews help employees understand what progression requires, even when a particular successor list remains confidential.
Make the process fair and evidence-based
Succession decisions can be distorted by visibility bias, affinity bias and assumptions about who “looks like” a leader. Employees who work close to senior decision-makers may get more attention than equally capable colleagues whose contributions are less visible. Structured criteria, cross-functional input and documented evidence reduce these risks.
Diversity deserves serious attention, because pipelines can reproduce past patterns if organisations select only people who resemble current leaders. The aim is not to lower role requirements; it is to assess talent against relevant requirements and open development opportunities to a broader range of people.
HR should facilitate the process, challenge unsupported assumptions and maintain appropriate confidentiality. Business leaders remain accountable for continuity in their functions.
Review the plan as the business changes
A succession plan is only useful if it is current. Review critical roles, candidate readiness, development actions and emergency cover at a regular cadence, and consider upcoming changes such as expansion, new technology, restructuring or new regulatory demands that may change which capabilities matter most.
Useful indicators include the share of critical roles with a credible cover plan, progress on development actions, internal moves into key roles and the time needed to restore capability after a vacancy. Numbers should support discussion, not push teams to nominate successors just to meet a target.
Frequently asked questions
What is succession planning?
Succession planning is the process of identifying business-critical roles and preparing people, internal or external, who can step into them, so that the organisation can keep running smoothly when someone leaves or moves.
Which roles need a succession plan?
Any role whose sudden vacancy would seriously affect safety, customers, revenue, compliance or strategy, including specialist and operational roles, not only senior leadership.
How often should a succession plan be reviewed?
At least once a year, and whenever the business changes significantly, for example through expansion, restructuring or a key resignation.
Continuity is built before the transition
Succession planning is often mistaken for a confidential chart. In reality, it is an ongoing leadership discipline that connects business risk, capability assessment, employee development and future organisational needs.
The strongest plan is not the one with the longest list of names. It is the one that makes the organisation less dependent on any single individual, creates meaningful development opportunities and gives leaders confidence that important work can continue when roles change.
Further reading: CIPD, Succession planning factsheet.