Optimasi Penjadwalan Produksi Menggunakan Metode Nawaz Enscore Ham Pada PT XYZ

Abstract

At PT XYZ there are 19 types of production in a week which are completed with 3 shifts in 7 working days. Improper production planning made PT XYZ's production unable to meet production targets resulting in a lack of products requested by vendors, no scheduling revision efforts were made by PPIC with weekly MPP indicating that the production process was still running even though the number in the first week of the month there was a shortage of production which is so large that the production schedule that does not meet the target will be shifted to another schedule. thus causing production delays. The company's scheduled order of scheduling is Container GM5Z-3B PS, GM5Z-3B PS, Support FR Bumper Side RH, Support FR Bumper LH, T-Belt Cover Protector Base, T-Belt Cover Protector Cover, and Register Inst. Panel No.1 with a makespan value of 1545.76 hours. For this reason, PT XYZ is rescheduled in order to minimize the production completion time (makespan) of the production process. One method that can be used to overcome the problem of production delays which causes the production target is not to be achieved is using the Nawaz Enscore Ham method. The application of the Nawaz, Enscore, and Ham methods with the Shortest Processing Time (SPT) and Longest Processing Time (LPT) resulted in a decrease in mean flowtime and lateness of 1.56% and a reduction in makespan of 23.79 hours with LPT and SPT obtained the value of Efficiency Index ( EI) is 1.01563. From the Relative Error (RE) value, there is a difference of 1.56% which is compared between the NEH algorithm model in this study and the First Come First Service (FCFS) scheduling model.