Succession planning is a big topic among today's nonprofit execs and boards. Succession planning is not a topic eagerly embraced by execs in particular. Afterall, when we talk about succession plans we are addressing a an individual having to put aside their passion and livelyhood. And while nonprofits are technically owned by a nonprofit board, I recognize that for many execs, there would be no nonprofit if not for that exec.
The story in the Christian Science Monitor, albeit focused more on a classic "family" empire, does well to illustrate what can happen when succession plans are not developed. A word to all boards: don't let this happen to you.
By the way, the literature indicates that there are three types of succession plans: exec planned departure; emergency succession plan; and, leadership development succession planning. Best advice to date is that all three plans should be completed while recognizing that at minimum, an emergency succession plan (e.g. the exec gets hit by a bus) should be in place.
And, while I'm on the topic, succession planning is not specific to the nonprofit's paid leader but to the volunteer leader as well. If we consider that the average board member serves two three-year terms, then identifying the next board chair should be possible from any of the three pools of candidates that take office (assuming 1/3 rotation).