Simulation Model of Arjawinangun Workshop using ProModel 16 and Design of Experiments

Abstract

The workshop is a firm that provides equipment maintenance and repair services. The workshop under consideration in this study was authorized repair workshop that offered service areas and replacement components located in Arjawinangun District, Cirebon Regency. The problem identified are the vast number of clients and variations in requests at specific hours that the workshop personnel cannot quickly satisfy. As a result, the goal of this research is to provide optimal policies related to the number of repair slots and the service time of each motorcycle in order to maximize customer satisfaction. To answer the problem, a system simulation model and design of experiments (ANOVA) are used. The stages of the research were as follows: (i) preliminary investigation, (ii) developing the scope, issues, and research objectives; (iii) developing a conceptual model; (iv) gathering data and estimating parameters; and (v) developing and finding solution of the simulation model. The data used are the time between arrivals and the duration of each service procedure. Based on the results by testing the analysis using the response variable (R), the average decrease in consumer time in the system is 11.866 minutes and the average decrease in the number of lost sales is 8.6 people. Meanwhile, based on the simulation results of the existing and proposed conditions, the difference in the average time in the system was 9.19 minutes and the average decrease in the number of lost sales was 7.9 people. The recommended condition simulation findings may be reviewed and applied by the repair workshop management through staff training and the use of 5S in the service process. Furthermore, when implementing the recommended solutions, management must consider both financial and cultural factors.