For every interview or a meeting, I surf the internet and refresh my mind on "what to do in an interview". Almost every resource I read, stated that I need to arrive ~15 mins before the interview time.
I have noticed in most of the cases that I arrived earlier, the hiring committee stated that my appointment was at X:XX and not 15 minutes earlier; sometimes by the receptionist and sometimes later by the interviewer; Sometimes by both. They are like:
"Mr. Interviewer said your appointment is at X:XX, and he will be right with you."
Or something like:
"Hey you are here already!"
"Hey I did not expect you arriving now!"
I am asking because I believe it is the right thing to do. But what am I missing here? And what is the best time to arrive at an interview?