Our organization has just completed a large-for-us elearning development project. It totaled just under $1mm usd, and employed a team of approximately 40 people for six months. Most of our staff was on the project part-time, but about six were full time. We'll send out a questionnaire ahead of time, and convene the entire group for a single in-person session.
Here's the part we're not sure about: some people believe that the session should be a single large group session, while others believe that it should be broken down into functional areas. In our case this would include a production team, subject matter experts, instructional designers, etc. Some team members participated in several roles.
Both approaches have intuitive arguments, but intuition can't substitute for experience! What do you recommend?