Are XLRI and ISB too particular about past academics, like the IIM's?

XLRI and ISB are concerned about your past academics but not like the IIM’s. In the IIM’s selection process past academic info’s like the results of X, XII and graduation do matters. The eligibility criteria of XLRI and ISB are as follows:

• The major route for XLRI admission into the PGDM programmes is the XAT, which is followed by an individual interview. For the PGDM-GM programme, XLRI also accepts GMAT and GRE scores. 88 to 95 percentile is the XLRI XAT Cutoff.
• But along with the XAT scores, Individuals possessing good academic background along with relevant work experience and extra-curricular activities stays in the upper hand.
• Your former academic standing and how you did on the GMAT/GRE test help ISB (Indian School of Business) to determine how well you can handle the program's demands. Along with the total GMAT/GRE score, the institute also takes into account grades from the 12th grade, graduation grades, post-graduate grades, and certification scores, as appropriate.

While the Indian Institutes of Management (IIMs) do consider class 10th and 12th marks as part of their admission process, XLRI and ISB prioritize other factors like entrance test scores, work experience, and interviews. XLRI and ISB place less stringent emphasis on school-level marks, focusing more on holistic candidate evaluation in comparison to the IIM’s.

According to some of my friends at IIM Trichy, as far as IIMs are concerned, you will definitely find information regarding the weightage provided to X, XII & graduate marks that are accounted for in the selection process. However, for XLRI and ISB, there is not much information provided for this.

• From what you will observe from previous admissions, XLRI is not very critical about this. Your admission is mainly concerned with your XAT percentile and your PI performance which are the crucial factors.
• For ISB, they will probably not look at your X and XII marks but your graduate marks will definitely be an indicator. 
• If you are good at academics and if your profile matches the requirements of their 1-year rigorous program. 
• You are expected to have at least an 80 or more in your graduate years and if not, you will be required to compensate for it with GMAT scores in the area of 730 or more. 

You can be sure that IIMs consider class 10th and 12th marks but XLRI and ISB do not follow that strictly.