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NSF 391.1-2019

General Sustainability Assessment Criteria for Professional Services

The Standard is one of the first to focus on the service industry subsectors described as “professional services”. Professional service firms are often characterized as those that have low capital intensity, high knowledge intensity, and a professionalized workforce.


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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.

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