I applied online. The process took 4 weeks. I interviewed at ZS Associates (Chicago, IL) in Aug 2010
Interview
2 phone interviews prior to going to the office for in person interviews (4 further interviews)
Make sure you know why you want to be in consulting and why ZS associates. Prepare for case type interviews.
People are extremely friendly. There is opportunity to meet with someone currently in the position you're interviewing for, make the most of it.
The process took 3 weeks. I interviewed at ZS Associates in Feb 2011
Interview
The first round interview consisted of a phone screening with an HR representative. The second round consisted of 2 interviews, one with an OR associate and another with a manager. One of the interviews was behavioral and the second was a case interview. The final round interview consisted of 2 case interviews and 1 behavioral interview. The cases were with an OR associate and a Manager, and the behavioral interview was with a principal.
Interview questions [1]
Question 1
What is the most difficult problem you faced that was not in academics?
The process took 1 week. I interviewed at ZS Associates (Evanston, IL) in Mar 2010
Interview
I'm not really in a position to give advice, as I did not make it to the office visit. In total, I had two phone interviews before getting a form rejection e-mail. The first was a case study, which was awkward over the phone. Not much to prepare for there. The second was a behavioral interview where they seemed to want to get a feel for how I work in teams. Not well enough, apparently.
Interview questions [1]
Question 1
Tell me about a time when you had to deal with a difficult person.