The geology report, feasibility study, and mine plan look great. Why do so many mining project start-ups fail to perform? Most mining companies put a great deal of emphasis on the nature of the reserve, the mine plan, the extraction process to be used, and the process plant design—obviously all very important. Even when large, highly regarded engineering, procurement, and construction firms develop the project, operating results are very often disappointing. In this paper, we explore the role of Operations Readiness on the financial impact of mining project start-ups. A relatively small investment in operations readiness produces a huge financial return. Many investment firms, as well as mining company senior executives, fail to consider this important factor in operating success.