Data is an essential element of energy efficiency efforts. Interval meter data has long been the primary focus of analysis in M&V and energy analysis. By combining interval meter data with readily available tariff rate structures, equipment status data, and weather data, energy engineers and M&V professionals can achieve deeper insights into the viability and financial benefits of potential ECMs. Once implemented, the ability to easily combine these data provides more effective performance tracking and ECM assessment with less effort and cost. The result is improved financial results and sustainability of ECM benefits over time. Software tools designed for collection and analysis of these types of data enable these analyses to be performed with far less effort and lower cost than with manual analysis efforts. This presentation will highlight specific examples showing how these data can be combined to provide clear understanding of the interrelationships, correlations and cost impacts.