Is there any specific type of group that you're thinking of, or do you think that there is a one size fits all solution? The latter seems unlikely unless you are thinking of a meta-strategy for choosing between decision making processes rather than a decision making process.

I am thinking of, basically, a one size fits all solution. Obviously its implementation will vary greatly depending on the size, composition, and charter of the group. It could also be thought of as a meta-strategy.