The only thing I need from you is for you to generate a stock and flow diagram for this elevator control system. This is for a high level systems engineering class. Please make sure this is not just a flowchart.
 

Engineer an Elevator Control System that will serve as the internal control component of a broader elevator system installation in a building. The system you are modeling must exhibit appropriate collective behavior based on the combination of all active requests within the system. Over any period, visitors might press dozens to hundreds of buttons throughout the system and buttons continue to be pressed throughout any operational response to earlier buttons. Develop a system concept for the system that includes all major customer interactions and needed internal system events: The system owner is the elevator system manufacturer. The system must be engineered as a societal system. The control system is trying to minimize travel times (waiting + riding) The building is occupied by commercial and residential tenants in suites The system must be configurable to any elevator system installation: Multiple banks of elevators that can each include multiple shafts O A bank of cars can be committed to only a certain group of floors The cars/doors available on a floor constitute a lobby in the system Call buttons in each lobby contribute to the number of waiting passengers o Floor buttons within cars contribute to the number of active destinations