The HR interview was thorough - it was an in-depth, granular review of project management and management methodologies, whereas the in-person interview seemed to focus more on fit, skill-set and thought-processes on a more philosophical level. The HR interview was a full hour and comprised of a series of questions listed one after another, whereas the the in-person interview was more conversational (although this interview also had a set of pre-planned questions).

I had a very simple phone interview with an HR screener. She asked me various resume questions, then she gave me a mini skills test by asking me two basic supply chain questions. I only remember one of them: "If you have 100 widgets, then you increase the number by 10%, then you decrease the number by 10%, do you have more, fewer, or the same number of widgets compared to the beginning?" You'd have fewer (100 + 10 - 11 = 99). Then I went in the office for a second round interview and had four one-on-one interviews with managers.