Majeed, R.J. and Aziz, P.S. 2026. The Role of Integration Between Concurrent Engineering and Product Life Cycle Costing in Enhancing Competitive Advantages: An Applied Study in Garstin Industrial Company Operating in Duhok Governorate, Kurdistan Region of Iraq. KOYA UNIVERSITY JOURNAL OF HUMANITIES AND SOCIAL SCIENCES. 9, 2 (Jul. 2026), 123–137. DOI:https://doi.org/10.14500/kujhss.v9n2y2026.pp123-137.