The easiest way of measuring a team is through revenue returns. However, that might not be a complete measure.
A team can be measured on many different criteria, with categories such as the best self-managed team, highest-performing team, best knowledge-sharing team, best collaboration, highest improvement, and so on.
However, the trick is in measuring how critical the delivery is. One team may deliver a low-end project, whereas another may have far greater responsibilities and higher financial stakes.
It might be easy for a team of coders or testers to remain the highest-performing team, whereas the team for Quality Assurance might be under pressure.
Please keep a complete view of the supportive functions while measuring the team's success.
Here are a few materials to get you started. These aren't direct materials but will help you build a basic understanding with new ideas.
Building Team's Effectiveness
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Measure Your Team's Success
Looking forward to discussing more on this.