[davidmnoll]

The way I've done it is to get "quantitative" polling from other teammates.

Basically I do a poll of something like (a) confidence that the solution will fix the problem (b) estimated 80% confidence time range required. I do that for whatever options have been proposed, and then use the information to determine which option is the most promising. There's some principle that the average of many guesses is better than one, so I try to use that to make a better decision.