Basically It took 3 interviews
1st behavioral interview took 30 Minutes, 2nd Technical interview took 1.5 hours, 3rd Onsite interview/ Group or Panel Interview took 7 hours.
Behavioral was pretty straight forward, Give me an example where you handled conflict, Give me an example where you failed, Give me an example where you did something new.
Technical Interview started with a run through my resume. Tell us about your achievements, Then they asked questions about FMEA process, problem solving ability, then hardcore engineering questions about, Stress, endurance, Loads, Forces, Balancing, Part failure under Load etc.
Final Onsite Interview started with discussion on my resume and how I use my engineering knowledge in developing various products, What process and thinking I am using to solve various engineering problems. Then Questions about my achievements at previous job.
Interview started with a manager interview, after that my hiring manager took me on a city and manufacturing plant tour, asked similar questions. Then 1 hr Behavioral interview round asking questions like, where you see yourself in 5 years, What kind of a role you prefer in product development process etc, and then a HR wrap up at the end. Got offer after 3 weeks.