In my ongoing research I recently fell over Sherry Arnstein’s “A Ladder of Citizen Participation” that has managed to be referenced some 2538 times since it was initially published in 1969. If it’s new to you too, I recommend a read, it’s very “sixties” and sent me back to my more idealistic youth, but the “ladder” is still highly appropriate.
There’s a little bit of background to the late Sherry Arnstein by David Wilcox at Partnerships Online.