Prepared by the Standards Committee for Identifying, Quantifying, and Proving Loss of Productivity of the Construction Institute of ASCE

Identifying, Quantifying, and Proving Loss of Productivity, ANSI/ASCE/CI 71-21, describes key labor costs as typically the most variable, and a major component of, overall project cost. It provides guidance on tracking and measuring labor productivity to help prevent, mitigate, and recover cost overruns and to address loss of productivity disputes and claims, which are increasing in frequency and magnitude.

Topics include defining productivity and related terms; preparing, collecting, validating, and analyzing productivity data; detecting the presence and extent of disruptive events; preferred methodologies for quantifying productivity loss; and avoiding conditions that create productivity loss.

ASCE 71-21 is written from and applicable to a variety of perspectives, including but not limited to those of owners, designers, contractors, attorneys, mediators, triers-of-fact, educators, and researchers; construction-only, design-only, and design-construct projects; small and large projects; public and private work; and international and domestic contexts.