I always recommend when modelling truck cycles in a schedule to make sure you do some ad hoc haul path auditing (“sanity check” for speeds achieved in the model). So many mine scheduling engineers don’t! You might be surprised that the model is NOT doing what you think it is doing. Usually not what it should be doing anyway. One common problem I see in other peoples’ models (who haven’t looked at the haul path speed vs path segment graph) is an issue of high(ish) speeds modelled around switchbacks.