A study of Indomaret's success in the Indonesian minimarket retail sector has yet to be conducted from an operational perspective. This study presents an empirical investigation into the role of operational management, particularly in relation to store layout and service quality, in increasing customer repurchases at Indomaret. This study employs quantitative methods, utilising survey data collected via Google Forms, which will be analysed using SEM-PLS 3. The effect of store layout and service quality on repurchases at Indomaret is found to have a significant positive effect. Furthermore, the mediating role of service quality in the influence of store layout on repurchases is also found to be significantly positive. The novelty of this study lies in its empirical evidence of the mediating effect of service quality on the effect of store layout on repurchases at Indomaret. Furthermore, the study offers theoretical and practical implications.