Simulators of mining heavy equipment have been used as a tool in operator performance improvement for many years. As such, there is a substantial body of knowledge surrounding rates of human performance improvements in manned operations. With the growing population of autonomous haulage operations using simulator based training for manned roles, rates of human performance improvement in autonomous haulage operations are now becoming understood. This report summarises project methods, measures and results from simulator based operator improvement projects and compares these to methods, results and measures from traditional manned operations. It is anticipated that knowledge of human performance variability in autonomous operations may assist in improving autonomous project modelling accuracy.