"To assess the state of smart-grid deployment, metrics were established to measure these attributes. Data collection for the Smart Grid System Report (SGSR) was performed by interviewing 24 selected electricity service providers representing a cross section of the industry. As part of the agreement with interviewees, the results were provided to all participants in a blinded form in advance of delivering the SGSR to Congress.
As the interviews only involved electricity service providers, they emphasize aspects of the electric utility enterprise. Other aspects, particularly those of deployment advances on the demand side, were beyond the scope of these interviews."