Purpose-The contribution of design is regarded as one of the most crucial factors in the construction business. However, there remains ambiguity about how the design quality influences the customer satisfaction of the EPC project. This research study attempts to investigate the influence of design quality on customer satisfaction through the performance of the engineering team in the 5 sections in terms of the following areas: problem definition, solution validation, communication, decision-making, and professional analysis. Improving design quality and customer satisfaction has received considerable attention in recent years. This study examines EPC projects in terms of design quality and customer satisfaction.

Design/Methodology/Approach – A sample of 218 employees of Company T with a tenure of more than 1 year in Bangkok, Thailand responded to the offline questionnaire survey. A simple linear regression analysis was used in the data analysis. 

Findings –All the hypotheses were statistically supported. The result of this study suggests that design quality is a key factor in improving customer satisfaction.

Practical Implications – Results of this research indicate that the need for contractors to improve performance relates mostly to design quality. For an EPC contractor, the main benefit of high customer satisfaction is the opportunity to remain a customer’s potential partner in the future.

Keywords: Physiotherapeutic Rehabilitation, Cubital Tunnel Syndrome, Post Operative Cubital Tunnel Syndrome.

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