The duty of shipboard cranes is to lift and lower loads, as well as to handle floating facilities to lower or higher positions by means of fixed wire ropes, pulleys, and hook, and so forth. Hence, they play an important role in the productivity of servicing or manufacturing systems. Since each crane has distinguished properties than the others with respect to criteria and decision‐makers (DMs) may express the different standpoints regarding them, the crane selection problem (CSP) can be considered as a group multicriteria decision‐making (MCDM) problem. In this paper, interval type‐2 fuzzy sets (IT2FSs) are first used to evaluate cranes with respect to criteria. The synthetic value method of IT2FSs is then handled to integrate the ratings expressed as IT2FSs of each crane with respect to criteria into the single fuzzy rating. Finally, the multiobjective criteria importance through inter‐criteria correlation (CRITIC)–technique for order of preference by similarity to ideal solution (TOPSIS) approach is applied to solve the CSP in which CRITIC and TOPSIS are used to determine the objective weights and score of cranes, respectively. In addition, the limit distance mean (LDM) is introduced for ranking interval type‐2 fuzzy ratings in the above two techniques. In contrast, to demonstrate the potential application, the proposed methodology is implemented in a real case study and the ranking results are compared with those published in the literature.

中文翻译：

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解决船用起重机选型问题的多目标随机CRITIC-TOPSIS方法

船用起重机的职责是通过固定的钢丝绳，滑轮和吊钩等装置来提升和降低负载，以及将浮动设施搬运到更低或更高的位置。因此，它们在维修或制造系统的生产率中起着重要作用。由于每台起重机在标准方面都具有与众不同的特性，决策者（DM）可能会表达关于它们的不同观点，因此起重机选择问题（CSP）可以视为多标准多组决策（MCDM）问题。在本文中，区间2型模糊集（IT2FS）首先用于根据标准评估起重机。然后处理IT2FS的综合价值方法，以将表示为标准的每台起重机的IT2FS的等级集成到单个模糊等级中。最后，通过标准间相关性（CRITIC）的多目标标准重要性-通过类似于理想解决方案（TOPSIS）的优先顺序技术来解决CSP，其中CRITIC和TOPSIS用于确定起重机的目标重量和得分，分别。另外，极限距离平均值（在以上两种技术中，引入了LDM）以对区间2型模糊等级进行排名。相反，为了证明潜在的应用，所提出的方法在实际案例研究中得以实现，并将排名结果与文献中发表的排名进行了比较。