COMPARISON OF PRODUCTION SCHEDULING TO REDUCE THE OCCURRENCE OF PRODUCTION PROCESS DELAYS (Case Study of PT. SEMARANG MULTI CONS)

Abstrak

PT Semarang Multi Cons is a company engaged in manufacturing that produces ready mixed concrete or what is called ready mix. The company is located at Jl. Lingkar Kaliwungu. Kaliwungu, Sumberejo, Kendal Regency, Central Java 51372, Indonesia. The company experienced delays in the production process so that many jobs were late. In January 2024, out of 39 job orders, 10 jobs were late. Increased product demand needs to be balanced with good production scheduling in order to reduce the total completion time (makespan). In the production process there are delays in the production process, due to limited labor, with a lot of demand, making the company experience problems with delays in the production process. The absence of production scheduling makes some orders late beyond the specified due date. Comparison of the
Shortest Processing Time (SPT), Longest Processing Time (LPT), Earliest Due Date (EDD) & Hodgson Algorithm methods in this study aims to find effective time in the process of making ready mix concrete so that there is no risk of delays during the production process with what is the most appropriate method that can be used in the company. Based on the results of the four methods, it can be concluded that using the sequencing method with the Earliest Due Date (EDD) method is the best, because it is more effectively used, namely having a value of 0.05.