Method of managing a departure of an automated guided vehicle and a departure management system of an automated guided vehicle performing the same

A departure management system of an automated guided vehicle, the departure management system comprising:

• a first host which generates a work order for transporting an article stored on shelves immediately next to a first port from the first port to a second port and set a priority of the work order;
• a first controller which generates a movement order for moving the automated guided vehicle from a current point of the automated guided vehicle to the first port based on the work order and the priority of the work order;
• a second controller which determines a queue value of the first port which is a number of the shelves storing the article included in the first port;
• and
• a second host which sets a port priority based on the queue value of the first port,
• wherein the first controller resets the priority of the work order based on the port priority.