Do the improvement programs really matter? An analysis using data envelopment analysis

This research aims at analyzing the impact of continuous improvement and learning processes regarding efficiency and production volume in an armament manufacturer. A longitudinal case study comprising a period of six years of analysis in the company production lines was carried out. Data Envelopment Analysis (DEA) combined ANOVA test and linear regression were used. The survey results show that continuous improvement and learning projects were not enough to increase efficiency in two of the three production lines analyzed. Therefore, the variables related to Kaizen events, hours of training and experience of employees did not increase the efficiency of these lines. Moreover, the study elucidates that the production volume negatively impacts efficiency in one of the lines. With the analysis, it is possible to identify which factors are representative to increase production efficiency. Therefore, it is concluded that technology upgrade, in this context, is an important factor to be considered. The research contributed to analyse the relevance of continuous improvement actions, accumulation of knowledge and learning in an armament manufacturer. In addition, it allows managers of companies to evaluate more effectively the production process and technological evolution with a greater understanding of factors that impact on increased operational efficiency."