Of the roads to promotion, taking a standardized test with the resulting paperwork, reviewboard, commanding officer scrutiny, etc., whatever is needed, is an established pathway. Achieving great things in the field isn't as quantifiable as a standardized test.
Think of it as the difference between completing school by moving through the grades and acquiring an equivalency certificate, loosely (not a perfect analogy)
Think of it as the difference between completing school by moving through the grades and acquiring an equivalency certificate, loosely (not a perfect analogy)