Use case name : Move to Station
Main sequence :
1 
The Supervisory System sends a message to the AGV system requesting it to move to a factory station and load a part .
2 
The AGV System commands the motor to start moving .
3 
The motor notifies the AGV System that the vehicle has started moving .
4 
The AGV System sends a Departed message to the Supervisory System .
5 
The arrival sensor notifies the AGV System that it has arrived at factory station .
6 
The AGV System determines that this station is the destination station and commands the motor to stop moving .
7 
The motor notifies the AGV System that the vehicle has stopped moving .
8 
The AGV System commands the robot arm to load the part .
9 
The arm notifies the AGV System that the part has been loaded .
10 
The AGV System sends an Arrived message to the Supervisory System .
Alternative sequences :
1
Step 6 : If the vehicle arrives at a different station from the destination station , the vehicle passes the station without stopping and sends a  Passed factory station without stopping message to the Supervisory System . 
2
Steps 8 and 9 : If the Supervisory System requests the AGV to move to a factory station and unload a part , the AGV will unload the part after it arrives at the destination station .
Use case name : Send Vehicle Status
Main sequence :
1 
Clock notifies AGV System that the timer has expired .
2 
AGV System reads the status information about AGV location and idle or busy status .
3 
AGV System sends the AGV status information to the Display System .