The Commonwealth Fund. Why Not The Best? Quality improvement resources for health care professionals. [Web site]. Http://whynotthebest.org/ Updated 2014. Accessed July 29, 2014. WhyNotTheBest.org was created and is maintained by The Commonwealth Fund, a private foundation working toward a high performance health system. It is a free resource for health care professionals interested in tracking performance on various measures of health care quality. It enables organizations to compare their performance against that of peer organizations, against a range of benchmarks, and over time. Case studies and improvement tools spotlight successful improvement strategies of the nation’s top performers. A regional map shows performance at the county, HRR, state, and national levels. WhyNotTheBest.org is recognized as a “Health Data All Star.” Health Data All Stars is a directory of 50 prominent domestic resources for health data at the federal, state and local levels housed on the Health Data Consortium’s website. To compile the directory, consortium leaders spoke with leading health researchers, government officials, entrepreneurs, advocates and others to identify the health data resources that matter most.