Using Chart Alt-Metrics to Find the Transcendent Four Seasons/Frankie Valli Singles By Bill Carroll Previous postings in this blog have described the metrics used in these studies. In short, this work is based on point values that preferentially reward high chart rank and an area under the curve analysis is done to determine the score of each record. Then, to normalize for differences in the chart methodologies over time, each record’s score is divided by the scores of records entering the charts within six months before or after entry of the subject record. In this way, an “average” record score is always 1 and the subject record score is a multiple of the average. For these studies, scores are accumulated from all three of the major magazines in the 1955-1991 era: Billboard, Cash Box and Music Vendor/Record World. Normalized scores from the three magazines are averaged to calculate a final score; if a record does not chart in one of the magazines, ...