Hi deepverma,
Many Business Schools do not put much (if any) emphasis on an Applicant's IR Score, but they still expect Applicants to at least score at a minimum level on the AWA (typically a 4.0 out of 6.0). If you would like to know how any specific Programs view these sections of the GMAT, then you should contact them directly and ask (the School's representatives will likely be happy to answer any questions that you have).
1) What is your overall goal score?
2) When are you planning to take the GMAT?
3) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich