One panel interview over the phone, then one day of onsite interviews (2 panel interviews in one day), lunch, and a plant tour. For the phone interview, they warned it could take 2-3 weeks to learn if I made it to the next step. After the onsite interviews, they warned it could take them 2-3 weeks to decide if they would make a me a job offer, In both cases, it took them just a few days to get back to me because I really impressed them (their words)