Resilient safety culture (RSC) model earlier developed by authors is defined and categorized into three groups: behavioral, psychological and managerial capabilities. These groups are further sub-divided based on various subcontracts and indicators as found in the literature. Resilient safety culture comprises of the static and the dynamic component which makes it challenging to understand and control. This model thus shows how resilience in organizations can help in defending against uncertainty and safety hazards. A resilience index is needed to quantify and rank the projects in organizations and for relative comparison between sites or projects. In this paper, resilience index (RI) or safety culture index (SCI) is developed using a fuzzy synthetic evaluation method for safety critical organizations which helps measure the status of resilient safety culture in those organizations. Fuzzy synthetic evaluation (FSE) methodology follows the fuzzy set theory. The index is useful to evaluate various project sites or organizations and compare successfully as it takes care of the fuzziness information available. It can also help in disseminating resources to the weak RI projects. This paper also compares the fault tree analysis approach to fuzzy synthetic evaluation approach and finds that FSE approach is better.