Belt Railway of Chicago’s (BRC) Clearing Yard is the largest interchange yard in the United States. It is jointly owned by the six largest freight railroads and enables the exchange of railcars from one railroad to another. Railcars traveling from coast to coast are carried by at least two railroads, while the hand-over takes place at interchange yards. At this yard, railcars come from inbound trains, are processed and depart on outbound trains. BRC observed that a higher percentage of railcars started missing their connections, which increased the car dwell time in the yard, negatively impacting service quality and yard capacity. BRC engaged Optym to perform the root cause analysis of missed connections and to find solutions for these issues.