You take a tour. Make note of a few things to ask a few simple questions... "Where does all the ERP and information systems take place?" "What are the major bottlenecks?" etc. Everyone hangs out in the same room. Its hard to tell how selective they are. One of the interviewers said that they have very high hiring standards but then the girl overseeing the interview process kept on saying that she would like to hire all of us and that she really needs as many people as possible. I thought that I said some things that would kill my chances in the interview but was given an offer anyway. The math problem is super easy and the EXACT problem is found several times in other reviews. Look at some of the behavioral based questions and be prepared to answer some tough ones like "you are given a shift of 150 people, what do you do?" Its pretty open ended but they are looking to see how you think. They all have poker faces so its very hard to determine how well you are doing. I asked some questions which they really liked such as "Do you have any feedback for me?" "What are some of the key things you look for in a interviewee?" Etc. They will respect you more if you can ask a question that puts them on the spot.