The document outlines the importance of Measurement and Verification (M&V) in energy efficiency investments, emphasizing the need to quantify risks and manage uncertainty in business transactions. It introduces the International Performance Measurement and Verification Protocol (IPMVP) and discusses various M&V protocols while highlighting investment decision information needs for both demand-side and supply-side projects. Additionally, it reviews different contexts of M&V application across public programs and private firms, ultimately concluding that effective management of uncertainty in M&V is crucial for optimizing resource allocation.