The American Customer Satisfaction Index (ACSI), founded at the University of Michigan’s Ross School of Business and produced by ACSI LLC, is a national economic indicator of customer evaluations of the quality of products and services available to household consumers in the United States. The national index is updated each quarter and scores on a zero-to-100 scale at the national level. The ACSI produces indexes for 10 economic sectors, 47 industries, more than 225 companies, and more than 200 federal or local government services.