It starts with the "on line test". Do not take this lightly! It evaluates your reasoning skills and your potential as a manager/leader. If you fail the test, your interviewing process stops before it starts. And you will have to wait another year before you can take it again!
Since I was an experienced candidate (not a right-out-of-college grad), I did an initial phone interview, then I was asked to do a site interview. I was flown out to the site, did a series of 1:1 conversations with other managers (including breakfast and lunch), then was given a tour (where I asked lots of questions), then a 2:1 interview with the plant manager and one of the Ops Manager. Within one hour, I was given an offer (a letter stating my salary). Interestingly they knew there wasn't an immediate opening just yet, so I had to agree that I would be ok not knowing my exact position until I started my employment. (2 months later). I stated that I" understand", and that I would let them know my decision within two days. From there I did a drug test, and flew home. The whole process from start to finish was 4 weeks, and overall I think it was very fair and well executed.