Business judgement is the ability to make sound decisions and build hypotheses under uncertainty.
This skill is the dealbreaker in consulting interviews, especially for experienced hires
who have to be mature thought partners for clients from day 1.
As a candidate, if your ideas don't make business sense, sound superficial or naive, or are not tailored enough for a specific case, you are immediately rejected with the feedback "come back in a few years when you have more experience." But do you want to wait a few years?
Business judgement comes from all sorts of business and life experiences:
business projects, studies, books, relationships, travel, community involvement, etc.
Unfortunately, developing proper business judgement takes years,
but the process can be accelerated through proper training.
That's how young management consultants "hit the ground running on day 1."
You can do that, too