This paper presents the order to reduce the waiting time to transfer the refrigerated truck in a case study. Using the principles Dispatching Rules 7 How is First Come First Served (how original), Earliest Due Date, Shortest Processing Time, Longest Processing Time, Critical Ratio, Priority Queuing and Weighted Fair Queuing to use in grading. The priority is to reduce the waiting time. You can reduce the waiting time down the figure 17 with the table.