Enhancing service quality improvement strategies of fine-dining restaurants: New insights from integrating a two-phase decision-making model of IPGA and DEMATEL analysis

The traditional IPA model has been considered to be a decision-making tool for service quality management. However, the IPA model does not meet the assumptions of the service quality gap, and also cannot explore the connection between service quality attributes, which can easily lead to decision-making errors of service quality management. The purpose of this study is to apply the IPGA model and DEMATEL to explore the service quality improvement priority of fine-dining restaurants and the causal relationship between service quality attributes, and use it as the decision-making reference of service quality strategy planning and resource reorganizing for the restaurant industry with limited resources. The study applied the customers of 8 fine-dining restaurants in Taipei City as the study object, and there are 502 effective samples. The study result shows that the dimensions of reliability, responsiveness, and assurance are concentrated here, and are the restaurant service quality dimensions that most need to be improved from the customer perceptive. In addition, the total effect of reliability is the highest among all the service quality dimensions. Reliability and responsiveness, in addition to impacting each other, will impact assurance and empathy. According to the study result, through IPGA and DEMATEL, the service quality performance of fine-dining restaurants and the resource input priority can be grasped more objectively and accurately, which can be used as a reference for manager to plan the service quality improvement strategy.