[a_c]

I would say anything having indirect correlation has no easy way to measure. Ultimately a company is either looking for product market fit, customer growth or revenue/profit/cash flow depending which stage the company is in.

On top of being hard to measure, the data points generated through hiring is just too few and the data collection process is too long and subjective

Just ask your team if they like the new hire, can they make progress together. Things like do you like working with the new hire? Is the new hire bringing in new insights to the team? Is the new hire easy to work with? Is the new hire learning new things.

And most importantly, can the team let go of mismatch fast enough. Overall I would say it is just not worth it in measuring hiring.