I think no matter the approach it will need to be tailored to the needs of the team.

With some teams the survey approach pared with a workshop is great because it provides an element of anonymity which allows a truer reflection of team health to come out and means the workshop can be an effective, focused session.

I’ve run other variants using an adapted survey at the start of the workshop with each team member giving a red, amber green score for each area then used this as a launch pad for deeper discussion.

I’ve also worked with teams where the context means a survey or workshop probably isn’t the right approach — as an extreme example there might be an issue with psychological safety in the team — and the right seed for discussion was a process facilitated by an independent party, largely based on 1–2–1 discussions.

The right approach should reflect the context of the team and a good facilitator of a process will account for that in their design of the process.

I like the structured, scientific approach because it reflects how I like to approach product development (make hypothesise, run experiments, gather data, make better hypothesises). If that is the best way to build products, surely its also the best way to build a better team

All that being said, I would be interested to hear more about how you would structure a stand-alone workshop to dig into team health and help drive their continuous improvement journey.