If you want a tool that goes beyond assuming the mean, take a look at LiquidPlanner. It can model complex plans, and is based on ranged estimates that let you capture uncertainty in ways that most other told can&#x27;t.<p>Full disclaimer, I wrote a large chunk of the scheduling engine, so if you&#x27;re curious about it, just shout.<p>Heads up though, my son was just born, so it might take me a while to respond ;)