keyfigures in reporting

hi friends

can anyone let me how we can guide a layman ie user how we can do knowdledge transfer on key figures as keyfigures in the bw are very difficult to understand for user . so is there any easy way that user can check which key figure is related in whcih one in r/3 retail or any document whcih will help user to understand the key figures according to r/3 retail . if anybody carries any document can u please share with me . thankyou all .look forward to ur replies .