PT. PDK has implemented Total Productive Maintenance (TPM) to improve the effectiveness of the entire production and manufacturing process. In the implementation of the TPM it is still not optimal due to the frequent occurrence of loss and output which causes the production process not to reach the target. This research was conducted to determine the effectiveness of the equipment and manufacturing processes on the production floor in terms of availability rate, performance rate, and quality rate by using Overall Equipment Effectiveness (OEE) analysis and knowing the factors that are the biggest and dominant causes of decreasing the effectiveness of the machine or process manufacturing then identifies the cause and effect of the problem and proposes improvements. This research starts from the calculation of the achievement of Overall Equipment Effectiveness (OEE) and then identifies the most dominant factors causing the reduction of OEE performance through the analysis of Six Big Losses. The results showed that the average OEE value of the production process of PT. PDK for July to September 2018 is 61.7% where the value of this effectiveness is still relatively low because the OEE standard for world class companies is ideally 85%. The most dominant and large factors cause the decrease in OEE performance is a defect factor during the production process with a percentage of 49% and a set up and adjustment factor of 41%. of the overall time loss. The proposed corrective action is to provide training to operators and leaders on standardizing critical processes and training on understanding the ideal engine conditions for use in the production process, creating value stream mapping for each supplier, especially subcont suppliers, and standardizing raw material storage until finished products.

Keywords : Total Productive Maintenance, Right First Time, Overall Equipment Effectiveness, Six Big Losses.