I would want to launch the survey in Oct 2014 to our graduates from May 2014 so that they could assess the value of their MBA after being on the job for a few months.
The MBA Student Exit Survey provides a clear picture of perceptions of exiting students on a range of attributes including: faculty, curriculum, teaching methods, and measuring learning and ROI outcomes. We recommend this survey is fielded just before or soon after graduation for optimal survey response. Fielding just prior to graduation leads to higher response rates.
We also offer an Alumni Survey which explores the impact of the degree over time. You may be interested in this support article: Who is the target audience of the Alumni Survey?