Start with the mission, not the people, because the read is always against a job, so name the job first.
Invite the team. Each person gets a private link, six minutes, no account to create. Tell them how to answer, there are no right answers, just how they actually work, which is what keeps the data honest.
Watch the picture assemble as reads come in. Then read the instrument: the dots are your people, the line is what the mission demands, the band is the zone that meets it.
Finish by acting on the three signals, where you are exposed, where one person is carrying a whole dimension alone, and where strength is piling up unused. An afternoon, not a project.