It's not engagement results. It's not a retention rate %. It's not a diversity number.
I have found that there is one metric that is most useful to rate how you're building teams.
The core metric is how many people leave your team unexpectedly.
This is someone walking in and out of the blue saying, "I'm leaving".
These events should push us to reflect internally on what we could do better, what we're missing, etc. We can only control what we can control. So, this helps us focus on solving that.
Many reasons can cause this, but if you have a high level of unexpected leavers, this indicates:
These are all on a spectrum; they're not binary.
This is expensive.
The foundation of any relationship is trust. Low trust leads to high unexpected events. How do you build trust with your team?