This research aims to determine the influence of service quality and product quality on the level of customer satisfaction of Grapari Telkomsel Branch Gorontalo partially or simultaneously. The approach in this research is quantitative with correlational methods. Data collection in this research was carried out using a questionnaire. The total sample was 210 people obtained by a saturated sampling process. Data analysis in this research is quantitative inferential multiple regression analysis. The research results show that (1) Service quality has a positive and significant effect on customer satisfaction at Grapari Telkomsel Branch Gorontalo with a partial coefficient of determination of 28.90%. (2) Product quality has a positive and significant effect on customer satisfaction at Grapari Telkomsel Branch Gorontalo with a partial coefficient of determination of 28.50%. (3) Service quality and product quality simultaneously have a significant effect on the level of Customer Satisfaction of Grapari Telkomsel Branch Gorontalo with a coefficient of determination of 57.40%. The remaining 42.60% is influenced by other variables not studied such as price, promotions and customer emotions. This shows that the better the quality of service and product quality, the benefits of increasing customer satisfaction will be more loyal to using Telkomsel.
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