Kocerova, Svetlana, Henrijs Kalkis, and Zenija Roja. “Challenges With Efficiency Metrics and Possible Solutions While Using Lean Methodology in Service Industry”. International Scientific Conference “Business and Management” 16 (August 14, 2026): 617–625. Accessed September 13, 2026. https://conferences.vilniustech.lt/index.php/BM/article/view/2545.