L.E.G.S. is a graphical simulator that allows clients to model a charter airline, providing them with critical data about aircraft selection, homing and hub placement to minimize customer wait time and expenses.
It was used by several clients to design business plans for on-demand airlines worldwide.
It simulated not only customers' habits, wind and airport traffic conditions, but also "pop up" demand, and plane-based failures and diversions based on real MTBF data.
It was built as a Mac app in Objective C with the business logic in ruby for easy in-the-field changes in simulation logic.