Analysis and Measurement of Overall Equipment Effectiveness (OEE) Values of the CNC Cutting Machine at PT. XYZ

The CNC cutting machine installed at PT. XYZ's workshop, was reported with higher downtime, and caused production time losses. The methods used to identify the problems are the measurement of the machine's MTBF, MTTR, downtime and OEE values, while Six Big Losses, Pareto and Cause-and-Effect diagrams methods were used to identify the root causes. The results of the study show that the machine's MTBF value is 8,33 days, MTTR value is 8 hours, downtime value is 7 days and OEE value is 69.55%. This OEE value is still below the World Class Standard of 85%. The Six Big Losses method and Pareto diagram reveal that the machine's idle and minor stoppage, setup and adjustment time and reduced speed losses are the root causes of the problems. While the Cause-and-Effect diagram indicates that the operator indiscipline's, machine slow operation, long idle time, and incorrect working method are the factors contributing to the root causes. The conclusion is that company to perform improvement of machine capability, train the operator, and develop preventive maintenance program to ensure the machine's best performance.