Web based Expert System (ES) considered as a tool for decision making process. In the traditional supply chain, there is no standard or guideline created to evaluate or assess the potential trusted trading partner for collaboration purposes. If there is a request or a need for an evaluation, the team will be created and the assessment metric keeps changing according to the evaluation team and exposed to the bias issue. However, in web based ES, the experts’ knowledge and experience were encoded into ES and act as consultant to provide recommendation to the assessment and evaluation for finding a potential trusted partner.