The interviews for office staff are with the HR Manager and the Department Manager. They ask about 10 questions that require more than a yes or no answer. The interviews are around 20 minutes long. Normally you hear back in the next 3-5 days whether you got the job or not. Technician interviews are normally in a meeting room with the HR Manager talking about previous experience and the details of the job.
Some days are super busy, some are slow but it evens out.