Comparison of FCFS, SPT, LPT, and EDD Methods at the Utility Level and Production Scheduling of Huller Machines

Abstract

Machines play an important role in the production process. A huller machine is one of the tools in a company that runs in coffee production that used to peel the coffee skin. However, effectiveness of the production schedule by using the FCFS method is slightly waste more times. Hence, the other methods should be compared in determining the utility level to enhance the production and minimizes completion time by sequencing a particular work. The results shows that FCFS method have the completion time of 32.54 days, with 2.82 total works and 19.24 days of delay, with the utility of 35.40% for two active machines. On the other hand, SPT method has the completion time of 32.44 days, 2.81 total works, 19.26 days of delay with the utility of 35.51%. Nevertheless, the other method outcomes are various. The study also pointed out that the average utility of the five huller machines is 87.46%. We concluded that the SPT method as the most appropriate among the others to production scheduling of huller machine’s purpose.