SAG held two meetings in response to directives from the Illinois Commerce Commission in the August 2017 Final Order tariff approval dockets for Ameren Illinois and ComEd (see ICC Docket No. 17-0288 (Ameren Illinois) and ICC Docket No. 17-0287 (ComEd). This Weighted Average Measure Life (WAML) Report summarizes the work and conclusions of the SAG to address directives from the Commission. Specifically, this report describes the initial WAML methodologies proposed by the utilities, an overview of the meetings held, and describes consensus resolution.