Failing to Plan and Planning to Fail

I have written the following 'hearing' (something I hear someone else say, or heard myself think) in my little book. Something I heard myself think in this case. I believe it to be true: The Best Plans are made by Three People, when Two of them aren't in the Room. 

Putting together a cogent plan is a complex undertaking - it's putting a route to a required end through a misty future using combinations of experience and soothsaying and randomness. Even Star Trek's Spock, with his mind-sharing abilities, wouldn't be able to get a believable plan done, in a reasonable time, while committing to include all the things that may or not happen, from the perspective of others who may or may not even be from the same galaxy. It's got to be realistic but lie short of 'It's too hard, lets not bother'. Much better to have a single sensible, sentient being produce a plan in my opinion. Someone who is competent, realistic, has 'skin in the game' and, preferably, who has previously found themselves in the abyss left behind by failing to heed the second 'life guide' in this area which is Never Underestimate your Ability to Underestimate. Then have some others, particularly those who will help deliver the plan, test the route and amend by negotiation accordingly. A big hairy realisation is that A Plan is just A Plan. Despite great expectations, realistically, on anything moderately complex, there is little chance it will be right. A plan is just sensible suggestion to get you off the starting blocks. It's just A Plan. When (not if) things go poo-shaped (or, infamously, upon first contact with the Enemy ...') the production of a new plan will anyway be required.

Having the first plan provides a useful 'Something' for focussing conversations about required changes. It is Always Better Discussing Something than Nothing. Starting from scratch at every snake in the game is a wattless activity and just makes your waving arms ache.