PT. Bumimulia Indah Lestari is a manufacturing company that produces plastic packaging using injection molding machines. The problem faced by the company is the high downtime of the JSW J450AD machine. during the early semester of 2020, the total downtime of the machine was 18,060 hours. From these problems, the author tries to measure machine performance using the Overall Equipment Effectiveness method. OEE measurement results show an average of 72.35%. Based on the Pareto diagram analysis, the biggest causes of the low OEE number are reduced speed losses by 14%. After an analysis using FMEA, it was found that mold overheating was the biggest cause of failure with RPN 448. The recommendation for improvement given was to carry out routine inspections of the cooling system such as checking the condition of the hose, compressor chiller air pressure, and the condition of the nozzle.

Keywords : Injection Molding, Downtime, OEE, Reduced Speed Losses, Equipment Failure Losses, FMEA, Improvement.