The aims of this research are to improve the preventive maintenance plan and to prepare the autonomous maintenance plan of an automatic labeling system for a carbonated soft drink industry as a case study. The labeling system of the case study has experienced the wastes in maintenance. According to the maintenance problem analysis, the main causes are lack of or inadequate preventive maintenance program, inadequate work order monitoring system, and inadequate staff skills (problem-solving skills of maintenance) to perform work. Therefore, in order to reduce the number and length of machine breakdowns and the seriousness of breakdowns, the preventive maintenance program is used instead of breakdown and routine maintenance by which maintenance skills are required, and in order to improve how machines are operated and handled by improving the skills, and the autonomous maintenance manual is set up to prepare for autonomous maintenance. After the improved preventive maintenance plan has been developed and then implemented, it was found that machine downtime reduced by 1.35% and machine availability increased by 1.74%.

This paper aims to determine the optimum conditions in Chrome plating process for ABS products by using laboratory-scale experimental design, and taking a company in Chrome plating industry as a case study. This study is composed of two main parts; 1) screening design using a 2-level factorial design to find the few significant factors from a list of potential ones, and 2) analysis for the optimum levels of the factors using a 3-level factorial design and response surface methodology. The response used is the percentage of defects found in plated brass. The results of the study found that screening factor is able to reduce number of the factors from 6 to 4. Then the finding of conducting 3-level factorial design is that four factors significantly affect the response of percentage of defects found in brass specimen, at the 5% significant level. By using response surface method provides the Quadratic model which shows the relationship between four factors on the response. The information as appropriate factor levels in laboratory-scale experimental will be as a guideline for this company to reduce the amount of produced defect and to improve the surface quality of Chrome plating.