Applied online and a recruiter contacted me a few days later via email. I filled out a questionnaire and was contacted by a hiring manager (again via email) 3 days later asking what a good time for a phone interview would be. I received a call the next day from the hiring manager which lasted roughly 30 minutes. A time and location was determined for the onsite interview (2 days later).
The interviewers consisted of 3 current manufacturing technicians and 1 supervisor. The first part of the interview (30 minutes) was solely based on behavior with questions like: describe a time when you a conflict with a coworker and how you resolved it, describe a time when you saw another person performing an unsafe task and how you dealt with it (and then your views on workplace safety), and define ambiguous, followed by describing a time when you received ambiguous instructions and how you worked past it. During this portion it is important to include as many details as possible (they will ask you too), include: peoples names, the setting, time of day, etc. The interviewers will allow you some time to think of particular instances, though this can lead to periods of silence.
The second part of the interview (again approximately 30 minutes) consisted of a math test. The interviewers will ask you to open a packet and solve problems verbally, outlining your thought process, and then writing down the answers of a pad of paper. The questions are meant to be straight forward and simple (a couple of the questions were poorly worded and could be construed to be much more difficult). If your answer feels incomplete to the interviewers, they will attempt to push you in the direction of the intended answer. Then they will ask you if you have any questions (it is expected that you do).
After the interview they asked me to step into the hall and after a brief time the supervisor came back out and announced that the hiring manager would be getting in contact with me. A couple of business days later I received an email from a staffing consultant (not the hiring manager) about when a good time to review the offer would be (over the phone). The conversation took place the next day and was followed by an email with a formal offer letter.