Yangyuen S, Wisetsri W, Atawinijtrakarn P. A Development Model for Competency Improvement Support Maintenance Managers Food Processing Plant. RJPJ [internet]. 2022 May 20 [cited 2026 Sep. 28];16(46):328-41. available from: https://so05.tci-thaijo.org/index.php/RJPJ/article/view/256136