An EOQ Based Multi-Storage Location of Spare Part Inventories: A Case Study

Mohd-Lair, Noor Ajian; Pang, Chuan Kian; Liew, Willey Yun Hsien; Semui, Hardy; Yew, Loh Zhia

doi:10.4028/www.scientific.net/amm.315.733

Cited by 3 publications

(3 citation statements)

References 10 publications

(25 reference statements)

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“…The optimal order quantity formula, economic order quantity (EOQ), is used to determine the direct transfer strategy from central warehouse c to base i [ 36 ].

where Q is the optimal order quantity of airlines spare parts; Ω i is the annual demand for a certain type of repairable airlines spare parts for base i ; m i is the unit transportation cost for direct transfer of spare parts from central warehouse c to base i ; Storage c is the annual storage cost per unit of spare parts.…”

Section: Location Selection Modeling For Central Warehousementioning

confidence: 99%

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Research on Location Selection Strategy for Airlines Spare Parts Central Warehouse Based on METRIC

Wang

Qin

Sun

2021

Computational Intelligence and Neuroscience

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With the increased demands of airlines, it is important to study the location selection strategy for spare parts central warehouse in order to improve the allocation capacity of spare parts maintenance resources and reduce the operating costs of airlines. Based on the M/M/s/∞/∞ multiservice desk model and Multi-Echelon Technique for Recoverable Item Control (METRIC) theory, this paper proposes a spare parts supply strategy based on the spare parts pool network and establishes a location selection model for spare parts central warehouse. The particle swarm optimization (PSO) algorithm is used to iteratively optimize the location for spare parts central warehouse and adjust the location area of the central warehouse combining transportation facilities and geographical environment factors. Finally, the paper compares the operating results for multiple airlines in pooling and off-pooling states and verifies the effectiveness of the spare parts supply model and the advantages of cost control for airlines.

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“…The optimal order quantity formula, economic order quantity (EOQ), is used to determine the direct transfer strategy from central warehouse c to base i [ 36 ].

Section: Location Selection Modeling For Central Warehousementioning

confidence: 99%

“…e optimal order quantity formula, economic order quantity (EOQ), is used to determine the direct transfer strategy from central warehouse c to base i [36].…”

Section: Analysis Of Metric-based Airlines Spare Parts Supplymentioning

confidence: 99%

Research on Location Selection Strategy for Airlines Spare Parts Central Warehouse Based on METRIC

Wang

Qin

Sun

2021

Computational Intelligence and Neuroscience

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“…The storage has a vital role as a supporting element of spare parts inventory in maintenance activities. Inventory management is essential to ensure the smooth operation of the maintenance department [2]. Inventory management operations determine the storage efficiency of a product or spare part in a plant, especially for offshore plants that have limited storage area [3].…”

Section: Introductionmentioning

confidence: 99%

Design Process of Dme Storage System as Assembly Parts or Maintenance Spare Parts Inventory in Offshore Oil Drilling Piping System

Cahyati

Mahendra

2020

Sinergi

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Discharge Manifold Equipment (DME) is an output pipe from a pump that bears an essential role in a piping system in offshore oil drilling, so it is a must to assure good bears condition whenever used. It is not an easy thing because DME is a significant and heavy component. Also, unfavourable conditions of offshore climate can accelerate its corrosion. Storage with the modular rack uses an offshore container certified DNV 2.7-1 / EN 12079 will be designed to fulfil those needs. The storage has an important role as an element in inventory, both the storage system for assembly parts or maintenance spare parts. This storage will be design using 4 (four) phases from VDI 2221 methods, namely; task clarification, conceptual design, embodiment design, and detailed design. Hydraulic power will be added to the system to support the piston movement so that the storage rack can be moved automatically by the hydraulic system. This storage has given the best solution for a systematic storing DME in the piping system of offshore oil drilling.

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Optimal partly repairable spare inventory policy by MDP under warranty

Fan

Guo

Wang

et al. 2015

2015 Annual Reliability and Maintainability Symposium (RAMS)

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Aiming at the problem of spares inventory in warranty logistics, this paper applies Markov modeling to the optimization of spares during the warranty period which considers the case where the repairable item is discarded, analyzes the transfer process of spares in operation, and stock, repair and discard of spares. In the Markov model, the actual situation of installation quantity of components in the system is finite, is taken into consideration and an optimal strategy is introduced. By applying a convex optimization algorithm based on the Markov model, the optimization spares configuration scheme is determined to minimize the cost under a specified availability. Meanwhile this paper builds an application case for this model, and verifies the model and algorithm proposed in this paper by simulation.There are three innovation points of this research. 1) A repairable item that may be discarded is taken into consideration in the warranty period. 2) Build partly repairable spares optimization model by Markov under variational warranty period. 3) A suitable convex optimization algorithm, which can find the optimal point through solving a large number of iterative calculations quickly, is designed. I TRODUCTIOWith complexity of products increasing and fierce market competition, warranty has become the important means of non-price competition in the market considerations of manufacturers while warranty periods are increasing. However, the warranty cost has become a huge burden on enterprises which typically varies from 1.5%~10% of the total sales of commodities [1]. According to some analyses, the spares cost account for 30%~35% of the large-sized complex products life cycle cost. Reducing the spares cost can help to control the whole life cycle cost. Meanwhile, among the three factors influencing the complex system downtimes, spares waiting time weigh more than the corrective maintenance downtime and the preventive maintenance downtime. In the product warranty period, not only ineffective manufacturer spares management will increase its warranty cost, but shortage of spares contributing to long downtimes will bring customers a great economic loss and dissatisfaction with the product. In addition, for large-sized complex system under a certain level of reliability, perfectly repairable components may be discarded with the increasing times of maintenance in long warranty periods, indicating characteristics of partly repairable components. In these mentioned cases, traditional researches for perfectly repairable spares models cannot completely meet new requirements of engineering. Less system down time and higher availability can be realized with timely and sufficient supplies of spares in maintenance processes, and to achieve that, scientific optimization decisions are necessary for partly repairable spares configurations in warranty periods. Further, improving the user claims experience and minimizing the warranty cost to reduce the economic burden of post-sales services can also be realized.Currently, even though many...

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An EOQ Based Multi-Storage Location of Spare Part Inventories: A Case Study

Cited by 3 publications

References 10 publications

Research on Location Selection Strategy for Airlines Spare Parts Central Warehouse Based on METRIC

Research on Location Selection Strategy for Airlines Spare Parts Central Warehouse Based on METRIC

Design Process of Dme Storage System as Assembly Parts or Maintenance Spare Parts Inventory in Offshore Oil Drilling Piping System

Optimal partly repairable spare inventory policy by MDP under warranty

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