One of the world’s largest iron ore mining companies wanted to increase its production capacity by 30% over the next three years, but expected that this might cause rail maintenance problems as well as increased train delays. With the trains becoming heavier, maintenance of tracks could become unsustainable given the current network constraints. Also, with trains running more frequently, the existing signaling system could create extra delays in critical parts of the network. However, by making certain operational and infrastructural improvements, the company would be able to maintain sustainable track health and reduce delays while achieving this higher capacity. The company hired Optym to identify improvement opportunities that would make its desired capacity increase a realistic goal.