Several rounds of interviews are there for managerial level. So, it takes a little bit time to complete the whole process. You can expect a month can be there to finalise the whole thing. But the processes are transparent.

There is no fixed process. TA function doesn't have clarity what to do and whom to hire. The intervier will keep you waiting for long hours. Even HR round is also like that. You will fed up waiting long Unprofessional company. Don't expect feedback. Caution - Don't go through consultants. Complete waste of time