For me, Roman Voting is a simple up or down vote made with thumbs.  However, a lot of other thoughtful Agile practitioners (here and here and here) allow participants to vote with their thumbs sideways.  I am not saying these people are wrong, I am saying that I do not include this variation since it confuses this technique with the Decider\Resolution protocol.

Here is what I call a “clean” Roman Voting technique.

  1. Everyone votes at the same time.  Thumbs up signifies a “yes” (or agreement) while thumbs down signifies a “no” (or disagreement).
  2. Count the number of thumbs up and thumbs down.  Depending on the decision-making rule (consensus or majority rules), the proposal either passes or fails.