Pratiwi, A. A., I. M. Nabilah, and N. A. Wessiani. “Integration of Service Quality Method (SERVQUAL) and Lean Concept to Improve Service Quality: Case Study in Medical Center of ITS”. PROZIMA (Productivity, Optimization and Manufacturing System Engineering), Vol. 9, no. 1, June 2025, pp. 1-13, doi:10.21070/prozima.v9i1.1714.