This document summarizes a study that analyzed the perspectives of 354 leaders of interdisciplinary environmental and sustainability degree programs. The leaders were surveyed about factors influencing their program's success. An exploratory factor analysis identified 9 key areas of influence, which a cluster analysis grouped into 3 views held by program leaders. View 1 leaders emphasized curriculum design, View 2 added an applied learning focus, and View 3 further emphasized external partnerships. The views differed in what factors were most important to success and leaders' program attributes. Challenges varied but included institutional support for all views and external engagement for View 3 programs.