Not the same person, but it really depends on projects. E.g. I have some projects that involve working to large specification sets where we can measure rate of

Not the same person, but it really depends on projects. E.g. I have some projects that involve working to large specification sets where we can measure rate of delivery against the spec. If your spec is fuzzy and incomplete, then it gets hard, but then you have little insight into human productivity for those projects either.