Well, legally consistent application is very important. If getting an 80% if the cutoff for candidate A, and getting a 65% is acceptable for candidate B, then y

Well, legally consistent application is very important. If getting an 80% if the cutoff for candidate A, and getting a 65% is acceptable for candidate B, then you're now setting different standards for different candidates. What if those different standards align with something like gender, or religion? It may not happen on purpose, but it's a problem. Statistically, you've created a model for consistent application, and if you don't consistently apply then the anticipated value of the tools you're using is now in question as the model has a large source or error involved now. I don't mean to say subject evaluations have no place in the process. Think of each part of the selection process as an independent stage. The candidates can pass the objective tests, perhaps with a minimum cutoff score, then pass the subjective judgment test. Or vice versa (though that may limit utility further).