Fig. 5 below shows an example of the stimulation model.
From the diagram, there are several available parking spaces
in first floor such as A73, A92, B43, B81 (those labels with
green color are available, red are occupied), so the system no
needs to search available parking at second floor. Then,
system will find the shortest path from those available
parking spaces and return the parking lot ID to user. A
function panel is designed to show the detail information of
stimulation result.