This page explains how James Winn (USATT# 60903)'s rating went from 1976 to 1992 at the Bartlesville RR held on - 30 Aug 1997. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.