The International Performance Measurement and Verification Protocol, or IPMVP, is a non-prescriptive framework that provides a consensus approach to measuring and verifying efficiency investments. Its objective is to reduce barriers to the energy and water efficiency industries, and it is used broadly by energy services companies, utilities, government agencies, building managers, manufacturing managers, and industrial managers. The IPMVP offers a consistent approach to measuring and verifying carbon emissions reduction in various energy sectors. As primarily a non-prescriptive framework, the IPMVP provides an overview of M&V's current best practices while remaining flexible.