What a succession plan actually is
Most documents titled 'CEO succession plan' are a list of names with readiness ratings attached. That is a bench summary, not a plan. A plan answers four questions in writing: what the organisation will need from its next chief executive, who inside the business could credibly do it and by when, who outside the business could, and what happens if the seat empties tomorrow.
Each of those has a different owner and a different review rhythm. Conflating them is why so many boards discover, at the worst possible moment, that they have ratings but no options.
Start from strategy, not from the incumbent
The most common error is specifying the next chief executive as a better version of the current one. The useful exercise is to describe the two or three defining challenges of the coming cycle — a market shift, a capital programme, a regulatory transition, an integration — and then describe the leadership those challenges demand.
Write that specification down and date it. It becomes the yardstick for internal development, for external mapping, and later for the appointment itself. Where a board cannot agree the specification, it is not yet ready to assess candidates, and any assessment it runs will measure preference rather than fit.
The internal bench: two names, honestly rated
For a critical role, two named internal candidates is a workable minimum. One name is a hope; three or more usually means the criteria are loose. For each name, record what has been demonstrated, what has not, what experience would close the gap, and how long that would take.
Development follows from that record: a P&L of meaningful scale, a board-facing exposure, a period of external stakeholder ownership. Ratings without assignments attached do not move anyone closer to readiness, and boards should treat an unchanged rating two years running as a finding in itself.
The external map: options kept warm, quietly
A live external map is a documented view of who else could lead the organisation — roughly fifteen to thirty individuals in the relevant markets, refreshed annually, with no approach made. Its purpose is not to shop for a replacement. It is to give the board a real comparison and to remove the panic premium from a future decision.
This work is confidential by design and does not signal distrust in the incumbent or the internal bench. In our experience it strengthens internal candidates more often than it displaces them, because it converts a subjective sense of readiness into an evidenced one.
Emergency cover: a page anyone can execute
Emergency cover is a separate, deliberately short document: who assumes authority immediately, what they can and cannot decide, who tells the workforce, investors and regulator, and in what order. It should be executable by whoever is in the room, without reference to the chair's judgment on the day.
Review it whenever the leadership team changes. An emergency plan naming an executive who left eight months ago is worse than no plan, because it invites hesitation at exactly the wrong moment.
Board succession runs on the same discipline
Chair and committee succession suffers from the same drift. Tenure clocks are known years in advance, yet chair appointments are frequently made in the final quarter before a departure. A dated skills matrix, a chair specification, and a mapped market of candidates address this with far less effort than a rushed external process.
Where the chair and chief executive terms could end within the same eighteen months, treat that as a governance risk to be actively sequenced rather than a coincidence to be absorbed.
The transition is part of the plan
The weakest section of most plans is what happens after the decision. Announcement sequencing, the outgoing chief executive's role and end date, the first hundred days, and the support attached to any named development gap all belong in the document while the board is calm.
A written development plan agreed before the offer is the cheapest insurance available in a chief executive appointment. It costs a single conversation and it prevents the failure mode we see most often: a known weakness left unnamed, then exposed publicly in the first difficult quarter.
A twelve-month rhythm
Twice a year, the nomination committee reviews the specification against strategy, the internal bench against its development assignments, and the emergency page against the current team. Once a year, the external map is refreshed and the skills matrix re-run.
That is the whole discipline. It is unglamorous, it takes a few hours of committee time a year, and it is the difference between choosing a chief executive and accepting one.