In recent years, Internet technology has become an increasingly popular method for collecting user feedback and assessing customer satisfaction via web-based survey systems. Based on the web-based online system, data or information can be collected immediately. To analyze customer satisfaction, Importance-Performance Analysis (IPA) and Parasuraman, Zeithaml & Berry (PZB) are just some of the enhanced analysis tools that measure user satisfaction. In this paper, we are introducing a novel web-based user feedback survey system with a proposed new IPA index. To identify customer satisfaction, the new IPA model can reveal a more accurate quantity comparison and find potentially helpful information for customer satisfaction. The PZB model of service quality is a tool that companies can use to identify expectations and perceptions about business or commerce behavior and communication. However, there is no in depth research that discusses the performance of inter-IPA results or PZB dimensions. The performance results have demonstrated that our proposed model with an advanced IPA discrimination index can judge and identify inter-survey results more accurately for customer satisfaction assessment.