First and foremost, the development of plans creates expectations within the organization: “Oh, we have a plan, we must be ready to deal with so-and-so situation.” Obviously that’s an erroneous assumption if the plan actually won’t work. That false sense of security will leave your organization on the tightrope without a net. When crisis strikes, it would be better to have the organization think, “Hey, we need to figure this out…quickly!” That’ll at least give you the opportunity to come up with solutions that actually work.
And plans that don’t work will cause confusion (“We said we would take this action…why aren’t we doing this?”) and lost time (“We tried this and it didn’t work, so lets try something else.”)
Of course it’s best to have a good, solid plan that’s been trained and exercised. But in the absence of that, realize that a “bad plan” could be worse than none at all. -C