Collaborating and deriving scenarios that gives the desired business outcomes and making sure all team members understand the scenarios are a critical step in a Behavior Driven Development (BDD) process. OOPSI, is a collaboration technique, that facilitates this. OOPSI was originally coined by Jenny Martin and Pete Buckney.
We rolled out OOPSI in some of our client projects and seeing some great results. Here is a short video about OOPSI. If you would like to see a longer version, I have included a link in the comment.