. P. On-ekkasit, P. Jandang, K. Porluan, P. Saelim, and N. Wongwiwat, “A LEAN MANAGEMENT APPROACH TO DEVELOPING A MICROSOFT EXCEL SCORING CALCULATOR FOR DECATHLON AND HEPTATHLON”, JournalMSM, vol. 4, no. 2, pp. 44–59, Dec. 2025.