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- W2498688884 abstract "High availability of a system can be achieved by performing timely replacement of degraded or failed components. To this end, spare parts are expected to be available and reordered when needed. It is not uncommon that spare parts may deteriorate on the shelf because of their physical characteristics and/or the imperfect storage and transportation conditions. Such phenomena will affect the reliability of spare parts and the availability of the system. In this dissertation, we first focus on a system with single critical operating component and one unit of deteriorating spare part. For such a system, to ensure the system availability and cost efficiency, making a joint decision on component replacement and reordering time is of vital importance. In particular, we study both failure-switching and preventive-switching strategies, where cumulative damage is considered for the spare part switching from its in-stock to operating conditions. To determine the corresponding optimal component replacement and reordering policies, the long-run average costs are minimized under a fixed lead time. It is expected that the work will benefit quite a few industry sectors, such as mining, oil and gas, and defense, where the operation of systems heavily relies on capitalintensive components. To advance the research a step further, we have relaxed the system with only a single operating component to a more complex system with multiple components. In addition, we have eliminated the limitations on the order quantity and inventory capacity. To capture the on-shelf part deterioration, a two-phase deteriorating process is adopted, for which the first phase is from the spare’s new arrival to the identification of its degradation, and the second phase is the period thereafter but before the unit fails. Based on the parts’ degradation states, we introduce two different replacement strategies for the spare consumption, i.e., the Degraded-First strategy" @default.
- W2498688884 created "2016-08-23" @default.
- W2498688884 creator A5006262355 @default.
- W2498688884 date "2016-01-01" @default.
- W2498688884 modified "2023-09-27" @default.
- W2498688884 title "Study on Preventive Replacement and Reordering of Spare Parts Experiencing On-Shelf Deterioration" @default.
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