As the court held in the Three Judges' Cases (1982, 1993, 1998), a supreme court judge is appointed by The Honourable President of India on the recommendation of Collegium. The Collegium is a closed group of judges which consists of Chief Justice of India, four senior-most associate judges and senior judge of the prospective appointee resulting in Memorandum of Procedure to be followed.
The Collegium received wide criticism in 2015 and the parliament has passed a bill that Collegium must be replaced by National Judicial Appointments Commission (NJAC). Supreme Court itself claimed this law unconstitutional and stroked off this bill. They also requested to give suggestions, even from the general public on improving the efficacy of Collegium regarding the improvement of appointments of the judges.
Dr. V. Shashikanth