The Impact of Employee Training and Skills Development on Production Performance in Coin Manufacturing Operations

This study examined changes in technical competency and production performance following employee training and skills development in coin manufacturing operations. Using a quantitative one-group pretest–posttest design with a correlational component, all 12 coin press machine operators were assessed through a five-level competency skills matrix and official production records over 36 operating days before and 36 operating days after training. Wilcoxon signed-rank tests, paired-samples t-tests, and Spearman's rank-order correlations were employed. Overall technical competency increased from 3.12 to 3.98 (p < 0.001), with the largest gain in autonomous maintenance and troubleshooting. Average daily production output increased by 11.13%, while machine downtime and rejection rate decreased by 29.51% and 22.99%, respectively; all three performance changes were statistically significant. However, competency improvements were not significantly correlated with changes in production output, downtime, or rejection rate. These findings indicate favorable post-training changes in workforce competency and manufacturing performance without establishing that training alone caused them. Management should maintain competency-based training, strengthen standardized operating procedures, and regularly monitor operator skills and production indicators. The small sample, single setting, absence of a control group, and limited observation periods constrain causal inference and generalizability. By documenting measurable workforce and operational improvements, the study offers practical evidence relevant to SDG 4 (Quality Education), SDG 8 (Decent Work and Economic Growth), SDG 9 (Industry, Innovation and Infrastructure), and SDG 12 (Responsible Consumption and Production), particularly skills development, productive operations, and lower rejection rates.