Bombardier Manager interview questions

Started with a phone interview, then I was invited to meet the Director and Human Resources I had a follow up interview with the other Directors currently in that department I was asked to go for a medical test I have provided 3 references with their coordinates I have received the official offer by Human Resources

First - straight forward interview with HR. Then - callback a week or two later for an interview with a different HR person and the hiring manager simultaneously. Very very detailed questions re: how exactly will I accomplish the mandate, step by step, how will I do this or that. Never seen such level of detail in an interview, especially given that in reality the execution will differ from one company to another due to specificities. Perhaps 10 very specific questions related to the job itself - both theory and "how to". The interview was not difficult per see but it was very detailed and intense. The HR person said after the interview that she thought it went well, but 2 weeks later I was notified that someone else was selected.