This document discusses applying Theory of Constraints (TOC) principles to improve production at a mine. It describes how the mine previously struggled with inconsistent daily production around 40-60% of capacity due to constantly shifting bottlenecks. Implementing TOC principles involved identifying the main bottleneck (LHD fleet), buffering upstream and downstream work, and adopting new metrics to measure and sustain steady flow through the system. This increased average monthly production to over 75% of proven capacity, resulting in significant extra monthly revenue.