If you are facilitating decision-making teams and use consensus as your decision strategy or "rule", you know how the group can say "yes" to a proposal, but the consensus doesn't hold. Or you have one "stubborn hold-out" when you need unanimous agreement. Have your heard of a tool for reaching closure called The Gradients of Agreement Scale? It works well with decision-making teams and if you are interested in hearing more, I can post additional information about how I use it.
Gradients of Agreement is a deeper dive but similar to the " fist of 5" posted by Kirsten. With more complex issues, we agree to decision strategies and build the gradients of agreements into ground rules. Sam Kanen's book is a good resource tool for all facilitators (link below).
I heard a presentation by Sam Kanen, Community at Work, at the ODNetwork Conference back in 1998 in New Orleans (I was part of the host city committee). I am cleaning out files and found the session handouts again. I've scanned some pages attached and these are some good overview links: