1. A method for execution by a computing device, the method comprising: calculating respective normalized first metric values for each of a plurality of first metric values that are on a time scale and respective normalized second metric values for each of the plurality of raw second metric values that are on the time scale, wherein the plurality of first metric values are associated with a first metric, and the plurality of second metric values are associated with a second metric; identify an extremum of the normalized first metric value and the normalized second metric value at each time of the time scale to determine a plurality of extremum baseline values; and determine a plurality of sleeve values of the plurality of extremum baseline values.