Two round for different department, if pass for any position, then go to final interview.
The first two round mainly include some technical question, while the final interview is not so technical.
I applied through university. The process took 2 weeks. I interviewed at Dow (Midland, MI)
Interview
Only had one interview. I was applying for multiple positions as an intern. I was interviewed by six people at the same time but it was very comfortable. At that time, I didn't have much interview experience so I was surprised at how much it felt just like a conservation. It was a standard interview that was pretty easy. I just showed interest and asked a good amount of questions.