I had an initial phone screening by HR, followed by a phone interview with one manager and then was asked to interview in person. The in-person interview was 4-5 successive 1-hour interviews. This covered both technical questions, test concepts and inter-personal questions. There was a period of 5-10 minutes between interviews when I believe interviewers conferred to determine whether the candidate would continue in the interview process. I felt the interview was professional and my performance met expectations.