Comment by bitL

I'll bite: Isn't using scientific methods in HR similar to stock trading? I.e. you need to predict how well a given person would fit within a company; you can't really capture significant soft abilities like who-knows-whom, which might have significantly bigger impact on profitability of the project than any individual/technical contribution if you purely optimize for profit. You also need to take into account company's strategy, environment that is changing etc.