Great Place to Work measures companies on the following characteristics: Great Place to Work for All, executive team effectiveness, innovation, and people-focused programs. In a Great Place to Work for All, employees report high levels of trust, credible and respectful leadership, pride in the work, and camaraderie. We also look to see that employees consistently experience this great workplace, regardless of who they are or what they do. Each company is scored on our analysis of anonymous employee responses to more than 50 survey questions on our Trust Index Survey, together with our evaluation of company programs and practices as measured through our Culture Audit assessment.

More than 315,000 employees provided feedback to determine the winners of the 2018 list. To be considered, companies needed to have at least 1,000 employees and receive enough survey responses to achieve a 95% confidence level with no more than a 5% margin of error.