We have audited existing train kilometers used in Chennai PRS Centre.We have made the program generate distances for each train for each isl from the source. Then compared it with distances being used to calculate the PRS fare.If your are interested to do the exercise in your Railway, contact local CRIS office.
A similar auditing has been done with respect to distances in route tables used in UTS system of SR and SWR.
There are special pages for PRS User and UTS user.
Watch the indianrail site.
Payback from a Project like this starts immediately since it has ramifications on many areas