Demand-side management (DSM) critics continue to question the reliability of DSM program savings and, therefore, the need for funding such programs. In this paper. we examine the issues underlying the discussion of reliability of DSM program savings (e.g., bias and precision) and compare the levels of precision of DSM impact estimates for three utilities. Overall, the precision results from all three companies appear quite similar and. for the most part, demonstrate reasonably good precision levels around DSM savings estimates. We conclude by recommending activities for program managers and evaluators to increase our understanding of the factors leading to DSM uncertainty and reduce the level of DSM uncertainty.