About 22% of accepted applicants at SMU FT MBA program scored at 590 or lower, so it is possible, but more challenging to get into the Cox school with a 590. The problem you will face is that the average GMAT for your applicant pool is very high, so when put into the Indian Engineer bucket and compared to other applicants with a similar educational, work and cultural background, you will likely face an uphill battle. It's wise to go for round one, since this will increase your odds, but if I were you, I would spend some time this summer in a prep course and retake the GMAT, going for 650 or higher.