In order to understand how the advantages of internship programs influence the undergraduates, this study evaluated seniors' experiences with the internship program in marketing and logistics management department at the case university. Through the University Career and Competency Assessment Network (UCAN) system, we used Deming's 'plan-do-check-action' (PDCA) methodology to investigate the relationship between learning outcome, competency assessment, and curriculum improvement. Our study showed that after the internship, students' professional and common competencies were improved and interns were satisfied with the program. In professional competency, students get opportunities for direct learning and experience of product, price, promotion, and place. Among the eight common competencies, the highest score represents the 'responsibility and discipline'. The satisfaction surveys showed that it is very important to offer a rich and sufficient curriculum design. Also, it was found that 'communication expression' and 'job responsibility and discipline' are best achieved by real-world training. This research fulfils objectives of the PDCA cycle and fits teaching and learning quality improvement.