Presenting a Method for Evaluating the Safety Risk Management Process in Industries Using Fuzzy Logic Approach

Background: An effective process for preventing industrial accidents basically requires a thorough study of the environment, data collection, evaluation, and analysis of this information, determination of corrective action, and its implementation. Risk management provides an integrated framework for this important process. The purpose of this study was to identify the parameters of the risk management process, combine these parameters by fuzzy logic and construct a fuzzy model to obtain the risk management index and finally design a questionnaire with Likert scale to obtain the inputs of this model to evaluate the risk management process. Methods: This descriptive cross-sectional study was conducted in ۲۰۱۸ in Tehran. First, based on library studies and expertschr('۳۹') opinions, Jaques non-linear crisis management model was selected, and based on this model, the parameters of the risk management process were extracted. Then, a questionnaire with ۲۲ questions was designed to measure these parameters, the content and face validity of which were evaluated. Also, to evaluate the reliability of the questionnaire, the test-retest method and Cronbachchr('۳۹')s alpha coefficient were used. Then the parameters were defined as fuzzy numbers, the Fuzzy inference engine was programmed using fuzzy rules, and its validity was evaluated. Results: The fuzzy model has three stages, in each of which sixteen rules are used. In this fuzzy model, the defuzzification step was performed by four methods with the same results. The designed questionnaire contains twenty-two questions, the content validity ratio (CVR) for this questionnaire is ۰.۸۹, and the content validity index (CVI) for all questions was above ۰.۷۹. Cronbachchr('۳۹')s alpha coefficient for this questionnaire was ۰.۷۱۳. Face validity was determined quantitatively by calculating the impact score (more than ۱.۵). Using intraclass correlation coefficient and Pearson correlation coefficient, the existence of reliability between test times (test-retest) was confirmed, so that their values were ۰.۸۴ and ۰.۸۸%, respectively. Conclusion: The proposed fuzzy model has a high validity giving a correct evaluation of the risk management process and expressing the final result in the form of an index between zero and one hundred. The risk management process evaluation questionnaire has good validity and reliability with the interpretation that the item has good face validity and is understandable, simple, and fluent for the sample group. Using this tool, industry managers can evaluate the safety risk management process, making them able to identify the strengths and weaknesses of this process, and finally take steps to eliminate the defects and improve this process continuously.

Keywords:

Questionnaire design , Risk identification , Risk prioritization , MATLAB Software , Validity , Reliability , طراحی پرسشنامه , شناسایی ریسک , اولویت بندی ریسک , تعیین استراتژی , پیاده سازی اقدامات اصلاحی