I applied through college or university. The process took 1 day. I interviewed at Dow (Atlanta, GA) in Oct 2012
Interview
This was a on-campus interview for PhD graduates or to be graduates. The interviewer said that he is asking the same standard questions to everybody. Some of the questions asked were:
Why do you want to pursue a career in the industry instead of going to academics?
Tell me about your research.
How is your approach better than the others being used in the industry today?
How does your approach compare with others researching on the same topic?
In what areas can you contribute to the company with your skill set?
I applied online. The process took 1 day. I interviewed at Dow in May 2011
Interview
a phone pre-interview with HR people first. Then noticed for a one day on-site interview. Very intensive and exhausting but informative and enjoyable interview. Meet with ppl from different groups; ppl there are super nice and positive. Very impressive company. Questions are not difficult, but have to prepared ahead, e.g. what is your weakness, describe and give an example how to deal with difficult situation, what is your greatest achievement.