RETRACTED: Enhancing service quality: Key approaches Nurali Arabov, Sergey Yekimov, Gulnarakhan Utemuratova, Aziza Khamidova, Bakhtiyor Tukhliev and Sanjar Sultonov E3S Web Conf., 538 (2024) 02005 Published online: 14 June 2024 DOI: 10.1051/e3sconf/202453802005