It certainly is quite tough to get into JBIMS, especially for the full-time MMS Program. I’ve r the last few years JBIMS witnessed 3 admission procedures

Percentile required 99.5: Initially followed an admission procedure that included CET (200) + GD (17) + PI (17) + Past Academic Record (2) + Work Experience (2). This procedure was discontinued around 2012. Only 120 students were allotted a seat out of 10000 and the percentile required was around 99.5.

Percentile required 99.85: This admission procedure did not include the GD-PI round and the admission was done solely on the basis of a written test. This was a book for candidates who had average academic backgrounds and were very excellent in written English. However, this process could not focus on soft skills and other aspects of the candidate's profile so were discontinued. 

Autonomous Procedure: The current procedure is an autonomous one wherein the CAT/CET scores are considered along with GD PI WAT rounds. The weightage given to the written test has been reduced so as to enable candidates with lower percentile like 98.9 to get a chance too. They can prove themselves in the GD-PI round and hence make it into JBIMS. Approximately from every GE one candidate gets admission. One may think this is easy when in reality the competition is extremely tough due to the quality of the candidates. Each one of them is talented in one or the other areas and gives an edge to the other. There is no safe score as one may not get in even after scoring 99 percentile whereas one may get admitted even with 98 percentile. It all depends on your overall profile.