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Modelling age replacement policy under multiple time scales and stochastic usage profiles
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DOI：10.1016/j.ijpe.2017.03.009.png)
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Abstract
En 中文
This paper offers an original methodology to set multi-dimensional maintenance policies for machines whose aging processes require using multiple time scales. It can be considered a generalization of the traditional approach, that usually employs a unique time scale and sets a single age limit to carry out preventive maintenance actions. The methodology also considers situations in which a set of machines are operated using multiple usage profiles. We define usage profile as the relationship between the use of a machine in terms of one main time scale and another scale. In our case study the age of a mining haul-truck component can be best modeled as a combination of operating hours and load cycles since the last overhaul. We compare the results obtained with respect to using a single time scale policy. The comparison shows the importance of the bias in decision making that may arise due to incomplete modelling of the components' aging process.
Keywords:
Physical asset management
Maintenance policy
Multiple time scales
Multiple usage profiles
Maintenance decision support system
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