<![CDATA[One of the most important metrics for assessing a regional water supply company's service quality is how well it handles customer complaints. The effectiveness of complaint handling is influenced by several aspects of employee performance, including responsiveness, effectiveness, and efficiency. The purpose of this study is to examine how employee effectiveness, efficiency, and responsiveness affect customer complaint handling at PERUMDA Air Minum Tirta Ampera, Musuk District, Boyolali Regency. This research employed a quantitative approach using a survey method. Data were collected through questionnaires distributed to customers who met the research criteria. Multiple linear regression analysis, validity testing, reliability testing, classical assumption testing, partial (t) test, simultaneous (F) test, and the coefficient of determination (R2) were all performed on the data with the aid of SPSS. The results of the analysis provide an overview of the relationship between employee responsiveness, effectiveness, and efficiency and customer complaint handling, as well as the contribution of each independent variable in explaining the quality of customer complaint handling. The findings are expected to provide valuable input for PERUMDA Air Minum Tirta Ampera, Musuk District, Boyolali Regency, in improving service quality through strengthening employee responsiveness, effectiveness, and efficiency]]>
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