1. A business process simulation system for scheduling token arrival in a business process simulation, the system comprising: a frequency module for receiving user input defining a frequency of token arrival; a duration module for receiving user input defining at least one repeatable valid duration of availability to receive tokens; an exemption module for receiving user input defining an exemption duration within the availability duration; a timer module for receiving user input defining a recurring timer calendar for the business process simulation; and a token scheduling controller, wherein the token scheduling controller is adapted to process instructions corresponding to the user inputs from the frequency module, the duration module, the exemption module and the timer module.