A figure-of-merit for quantifying a comparable scientific value ranking the output of a set researchers work is proposed. The method is based on the Garfield Factor (GF) and thus related to the expected number of citations rather than the real ones. The measure allow comparisons of the scientific outputs between different sets of scientists where some papers are joint works between the comparative sets or between constellations with other sets. It has the advantages of having a rather small time-lag and that it is comparable between different subject categories. The measure is very easy to calculate and is complementing the existing indices or measures in an adequate way.