A Study on the Efficiency Evaluation for the Motion Parameters of the Manual Welding Process Using Data Envelopment Analysis

The shipbuilding industry has applied automatic welding systems to increase productivity as well address the shortage of skilled welder. However, a manual labor is still required in process where cannot be applied. Since past decade, number welders been continuously decreasing. Accordingly, various education equipment and have developed for order efficiency reduction training time . when educating trainees, educational prioritize parameters such current, voltage, gas flow, wire speed. In contrast, ergonomic hand tremor posture are neglected minor factors Therefore, this study, we analyzed trainees compared them efficiency. To conduct utilized analysis methods based on data envelopment (DEA) statistics DEA can evaluate relative between decision making units (DMUs) derive improvement way ratios. proposed method each trainee among experimental outcome from DEA.