Starting from last year counselling procedure has changed. Unlike previous years in 2015 counselling for NITs & IITs are conducted jointly.Few days after the JEE Mains & Advanced results are announced JoSAA (Joint Seat Allocation Authority) start it’s website [JoSAA] where you have to register. After registering Online Choice filling starts where you have to fill the branch you want join from the list of several given choices accordingly. This goes on for 5–6 days. After that a mock seat allotment is carried out in which students are allotted seats according to the data JoSAA collects till that date. Note - This is not the final seat but just an idea of who gets what. After that you are given one day to change your choices and lock when you are done.After this Seat allotment for different rounds are announced. And you have to visit Reporting Centres with the listed documents. You are given 3 choices whether to Freeze, Float or Slide the seat allotted.(1) Freeze option: Candidate is content with the allocated seat, accepts it and is not interested in participating in further rounds of seat allocation. This candidate will NOT be considered in subsequent rounds of admission.(2) Float option: Candidate accept the offered seat and wants to wait for a seat in an academic program of better/higher preference in any Institute.If he/she does not a seat in a higher preference program, he/she will continue with the currently accepted academic program. This candidate will be considered in subsequent rounds of admission.(3) Slide option: Candidates accepts the offered seat and wants to wait fora seat in an academic program of better/higher preference within the same Institute. This candidate will be considered in subsequent rounds of admission.And you are done. Quite easy with everything being online.