From 2020 to 2021, many KFC outlets went into liquidation because the company suffered losses to the point where they could not pay their obligations. Apart from the impact of the pandemic, the increasing number of competitors in the fast-food sector is also the cause of the decline in KFC's business. To survive, KFC must have service performance that can increase customer satisfaction so that customers continue to choose KFC as a place to fulfill their desires. KFC in Sungai Dua, Gelugor, Penang is the subject of this investigation. In conclusion, this study aims to examine customer satisfaction, happiness towards ambiance of perceived price, food quality, service quality, and physical environment quality, and also to examine related services designed to meet customer needs. We are using qualitative and quantitative methods to explore this study. After examining the findings, we found that all the variables tested show strong reliability except for variable physical environment quality.