Abstract
Condition-based monitoring is used as part of predictive maintenance to collect real-time information on the healthy status of a vessel engine, which allows for a more accurate estimation of the remaining life of an engine or its parts, as well as providing a warning for a potential failure of an engine part. An engine failure results in delays and down-times in the voyage of a vessel, which translates into additional cost and penalties. This paper studies a spare part management problem for maintenance scheduling of a vessel operating on a given route that is defined by a sequence of port visits. When a warning on part failure is received, the problem decides when and to which port each part should be ordered, where the latter is also the location at which the maintenance operation would be performed. The paper describes a mathematical programming model of the problem, as well as a shortest path dynamic programming formulation for a single part which solves the problem in polynomial time complexity. Simulation results are presented in which the models are tested under different scenarios.
Highlights
Spare part management deals with the procurement and ordering of the components of equipments used in manufacturing or service industries, in order to keep equipment in operating condition (Kennedy et al 2002)
We study a spare part ordering and maintenance scheduling problem arising in the maritime sector, where a ConditionBased Monitoring (CBM) system is used to monitor the condition of a vessel engine and its parts
The spare part management and maintenance scheduling problem we model in this paper arises when a warning is issued by the CBM system, and involves, for each part that is likely to fail, deciding on the time at which the part should be ordered, and the port to which the part should be delivered
Summary
Spare part management deals with the procurement and ordering of the components of equipments used in manufacturing or service industries, in order to keep equipment in operating condition (Kennedy et al 2002). We study a spare part ordering and maintenance scheduling problem arising in the maritime sector, where a CBM system is used to monitor the condition of a vessel engine and its parts. The particular setting assumed here is of liner shipping in cargo maritime operations, where vessels follow regular trade routes on fixed schedules that are normally designed at the tactical level of planning, e.g., three to six months (Wang et al 2014). In this case, a vessel journey is a sequence of port visits where timetables are published that include the planned arrival and departure times to each port.
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