The engine rooms of ships accommodate different machinery systems that are critical to ship operations. For these critical machinery systems to continue delivering the high level of service, operators are required to select and apply the best maintenance interventions. Currently, the selection of appropriate maintenance strategies for different engine room’s machinery systems is handled in a traditional way, regardless of in what condition such systems are. The aim of this paper is to propose a semi-qualitative model integrating AHP and PROMETHEE to select appropriate maintenance strategies for different critical machinery found in the engine rooms of ships. The proposed model consists of three maintenance alternatives among which decision-makers must select the best strategy according to four comparison criteria. The model is applied to select the best maintenance strategies for 17 different shipboard machinery systems in the engine room of a barge operating within West African waters. Finally, the results are compared with those obtained from a cost-benefit analysis approach (quantitative) as well as a survey of the experienced marine engineers who operate these machinery in the engine rooms of ships (qualitative). The results of the case study indicate that the proposed semi-qualitative method is a more robust approach for selecting maintenance strategies of shipboard machinery systems.

船舶的机舱可容纳对船舶运营至关重要的不同机械系统。为了让这些关键机械系统继续提供高水平的服务，操作员需要选择并应用最佳的维护干预措施。目前，针对不同机舱机械系统选择适当的维护策略以传统方式处理，而不管这些系统处于何种状态。本文的目的是提出一个集成 AHP 和 PROMETHEE 的半定性模型，为船舶机舱中发现的不同关键机械选择合适的维护策略。所提出的模型由三个维护方案组成，其中决策者必须根据四个比较标准选择最佳策略。该模型用于为在西非水域运营的驳船机舱中的 17 种不同的船上机械系统选择最佳维护策略。最后，将结果与成本效益分析方法（定量）以及对在船舶机舱中操作这些机械的经验丰富的船舶工程师的调查（定性）中获得的结果进行比较。案例研究的结果表明，所提出的半定性方法是选择船上机械系统维护策略的更稳健的方法。将结果与成本效益分析方法（定量）以及对在船舶机舱操作这些机械的经验丰富的船舶工程师的调查（定性）中获得的结果进行比较。案例研究的结果表明，所提出的半定性方法是选择船上机械系统维护策略的更稳健的方法。将结果与成本效益分析方法（定量）以及对在船舶机舱中操作这些机械的经验丰富的船舶工程师的调查（定性）中获得的结果进行比较。案例研究的结果表明，所提出的半定性方法是选择船上机械系统维护策略的更稳健的方法。