สุวรรณสาธิต ส. PRACTICE FACTORS OF LEAN CONCEPT. RMUTT-GBER [internet]. 2015 Dec. 30 [cited 2026 Aug. 31];10(2):39-54. available from: https://so03.tci-thaijo.org/index.php/RMUTT-Gber/article/view/241999