start routine

Hi all;

I have this headcount cube and the headcount has value 2 instead of 1 while running the headcount report. the same person is assigned to the same costcenter twice, we can do this restriction on query level..but we have several reports on headcount so we would like to control this in cube level. we have start date, end date, 0costcenter..in the cube..; Anyone have good thoughts on this how to starts?