This metric essentially compares each players point total to the point total of a baseline player for each position by subtracting the baseline players point total from each players point total. When using value based drafting the most important factor is the method used to pick the baseline player at each position. This article chooses its baseline players as explained in this article. Essentially the baseline player for each position is set to be the average number of players drafted at that position in the first 10 rounds of the fantasy football draft.
For example, if last year on average in a 10 team league 40 running backs were drafted in the first 10 rounds then the baseline would be set to 40. The baselines used for this example are based on 12 team leagues and on average: 17 QB's, 43 RB's, 40 WR's, 12 TE's, 6 DEF's, and 2 K's were drafted in the first 10 rounds of a 12 team draft thus the baselines were set at 17, 43, 40 and 12 respectively (DEF's and K's were neglected).