The Effectiveness of Lean Production Principles in Reducing Waste in Productive Institutions: An Analytical Exploratory Study in The Central Refineries Company (Al-Dora Refinery). jpsr [Internet]. 2023 Nov. 1 [cited 2026 May 13];6(3):194-210. Available from: https://www.jport.co/index.php/jport/article/view/150