to try and make it an even playing field (i.e. compare producers with non-producers) perhaps you could modify the equation to include factors such as cash at hand and book asset value.
this would give a lending hand to the producers that have already been value on their 'potential'.
so may I suggest an equation as follows
JORC reserves X POG X Cash at Hand X Non-mineral Asset Value / market cap
then range standardise to bring all values within the range of 0-100
