I applied through college or university. The process took 1 day. I interviewed at Boston Consulting Group in Jan 2011
Interview
2 one-on-one interviews back to back, took 1.5 hours. 5 minutes of general fit questions (impact, best accomplishment, high-pressure situation), then case study, then questions per interview. Format was the same for both interviews. Case studies involved some costs calculation, break-even point, profits, revenues. Thought it went alright, but messed up quant part.
I applied online. I interviewed at Boston Consulting Group
Interview
Initial Assessment/ Exam + 2 rounds of case interviews (2 ~45 minutes case interviews in each round). Was also assigned to a BCGer (someone who works at BCG to help during the process).
I interviewed at Boston Consulting Group (Boston, MA)
Interview
R1 was a straightforward case. I believe they were screening to see if you know how to case. R2 had more abstract and interesting cases. Behavioral aspects were focused on teamwork and the mission.
I interviewed at Boston Consulting Group (New York, NY)
Interview
First round consists of an online chat box case and then one live interview case. Second round is two back to back live interview cases. Good experience overall with nice interviewers.