The effectiveness of the traditional risk analysis approach is enhanced by the integration of the fuzzy logic and Multi-Criteria Decision Making (MCDM) methods. In fact, human decisions are ambiguous and blurred and do not fit to express with absolute numerical values. For this reason, it is more realistic to use verbal variables in modeling human decisions. In this paper, a new fuzzy based hazard evaluation approach is proposed to deal with the risk assessment process. The proposed methodology consists on MCDM with a fuzzy system which includes a hybrid structure consists the Pythagorean Fuzzy Analytic Hierarchy Process (PFAHP) method with cosine similarity, and also Neutrosophic Analytic Hierarchy Process (NFAHP) to support facing of uncertainty in the risk assessment process for asphalt production, laying and coating services which are important and should be examined in terms of occupational health and safety. To the best of our knowledge, this study is the first to propose facing uncertainty in the hazard evaluations and risk assessment for asphalt production, laying, and coating services. As an outcome of the analysis by the proposed method, according to PFAHP and NFAHP methodologies the criterions “manometer size” and “calibration” are found to be most critical factors, respectively.

通过将模糊逻辑和多标准决策方法（MCDM）相集成，可以提高传统风险分析方法的有效性。实际上，人为的决策是模棱两可和模糊的，不适合用绝对数值来表达。因此，在人类决策模型中使用言语变量更为现实。本文提出了一种新的基于模糊的危害评估方法来处理风险评估过程。所提出的方法基于带有模糊系统的MCDM，该系统包括混合结构，包括具有余弦相似性的毕达哥拉斯模糊分析层次过程（PFAHP）方法以及中智分析层次过程（NFAHP），以支持风险评估过程中面临不确定性沥青生产 重要的铺设和涂层服务，应从职业健康和安全角度进行检查。据我们所知，本研究是第一个提出在沥青生产，铺设和涂层服务的危害评估和风险评估中面临不确定性的建议。作为所提出的方法进行分析的结果，根据PFAHP和NFAHP方法学，“压力表尺寸”和“校准”标准分别是最关键的因素。