The Best Places to Work rankings are based almost entirely on data from the Office of Personnel Management’s Federal Employee Viewpoint Survey. Although OPM provided important government-wide and agency data from its 2017 survey, it initially withheld information on many small agencies and subcomponents. This made it impossible for the Partnership to include these organizations in the 2017 rankings released on December 6. On December 5, OPM provided data for these additional agencies. The Partnership analyzed the new data and on January 26 revised the 2017 rankings to include an additional 210 small agencies and subcomponents. The initial decision to withhold information stemmed from an OPM review of its privacy policies.