Public service delivery (PSD) is an issue with which the government of Thailand should be concerned as a first priority because it is important for improving the country’s sustainable development. The principal of democracy is citizencentered, where the quality of citizens’ lives is a significant goal for government to support the quality of life. The public organization that is closest to the citizen is the local government, and city municipalities are the strongest local government for PSD compared with others. Thus, this is the reason why ...