scholarly journals Availability Optimization of Multicomponent Products with Economic Dependence under Two-Dimensional Warranty

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Enzhi Dong ◽  
Zhonghua Cheng ◽  
Rongcai Wang ◽  
Xiaona Zhang
Keyword(s):  
Simulated Annealing ◽  
Preventive Maintenance ◽  
Simulated Annealing Algorithm ◽  
Single Component ◽  
Two Dimensional ◽  
Economic Dependence ◽  
Warranty Period ◽  
Warranty Cost ◽  
Annealing Algorithm ◽  
Availability Model

For multicomponent products, the maintenance of every component separately will increase the downtime and reduce the availability of products during the warranty period. To solve this problem, the economic dependence between the components is considered in this paper. Firstly, a single-component two-dimensional (2D) preventive maintenance (PM) availability model is established, and the simulated annealing algorithm is adopted to calculate the optimal 2D PM interval to achieve the maximal availability of any single component. Then, to ensure that the warranty cost of each component does not exceed the budget, the PM benchmark interval is introduced, and the PM work is optimized following the method of grouping maintenance. Based on this, the 2D preventive grouping maintenance availability model of multicomponent products is established. Finally, an example is given to verify the proposed method, and the results indicate that the proposed method increases the availability of multicomponent products during the 2D warranty period.

scholarly journals Research on Pricing of Flexible Two-Dimensional Extended Warranty Considering Preventive Maintenance

2019 ◽  
Vol 37 (2) ◽  
pp. 393-400
Author(s):  
Xiaolei Zhang ◽  
Chun Su
Keyword(s):  
Preventive Maintenance ◽  
Two Dimensional ◽  
Maintenance Strategy ◽  
Pricing Model ◽  
Reduction Model ◽  
Warranty Period ◽  
Extended Warranty ◽  
Warranty Cost ◽  
Usage Rates

Facing the uncertainty in transaction of two-dimensional extended warranty, a flexible pricing model is presented considering imperfect preventive maintenance combined with the degradation characteristics of item. The measure of two-dimensional preventive maintenance is carried out based on specified age interval or usage interval, the effect of imperfect preventive maintenance is described by age reduction model. The extended warranty cost is modeled from the perspective of manufacturer and customer, the method of gridding search is employed to optimize the maintenance strategy under different cases. Moreover, customized extended warranty price and warranty services are proposed on the basis of consumer usage rates. The results demonstrate that it is helpful to maximize the benefit of vendor by providing customized warranty strategy, the implementation of preventive maintenance during the whole warranty period can effectively reduce warranty cost for both sides.

scholarly journals Customized Preventive Maintenance Strategies for Products Sold with Two-Dimensional Warranty

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Fangqi Dong ◽  
Huaqiang Wang ◽  
Feng Men ◽  
Lijun Liang
Keyword(s):  
Numerical Analysis ◽  
Preventive Maintenance ◽  
Programming Model ◽  
Two Dimensional ◽  
Maintenance Costs ◽  
Maintenance Strategies ◽  
Warranty Period ◽  
Extended Warranty ◽  
Warranty Cost ◽  
Warranty Costs

Two-dimensional warranty has played a significant role in improving product quality and competitiveness. However, two-dimensional basic warranty (BW) and extended warranty (EW) have not yet been combined effectively, and the customized maintenance strategies based on the consumers’ heterogeneity have been quite limited, which result in high maintenance costs. In this paper, the possibility of reducing warranty cost over BW and EW is explored by classifying customers based on their usage rates and then offering them with customized preventive maintenance (PM) strategies. By considering the purchasing ratio of EW contracts, the PM strategies for BW and EW are closely combined by the bi-level programming model. Numerical analysis is given to show the application of the proposed warranty strategy, and the significant findings and sensitivity of the main parameters are analyzed in the end. The findings demonstrate that the customized PM strategies combining BW and EW can effectively reduce warranty costs within the warranty period and provide a scientific guidance for manufacturers to design a more reasonable PM strategy.

Protein Folding Simulation Based on Improved Simulated Annealing Algorithm

2012 ◽  
Vol 424-425 ◽  
pp. 246-249
Author(s):  
Jing Fa Liu ◽  
Zi Ling Zhou ◽  
Ze Xu Gao ◽  
Guo Jian Zhang
Keyword(s):  
Protein Folding ◽  
Simulated Annealing ◽  
Ground State ◽  
Lower Energy ◽  
Simulated Annealing Algorithm ◽  
Two Dimensional ◽  
Folding Simulation ◽  
Simulation Based ◽  
Annealing Algorithm ◽  
Annealing Method

Protein folding problem is one of the most important problems in bioinformatics. By combining simulated annealing method with pull moves which is a local move set and conformation update mechanism, we put forward an improved simulated annealing (ISA) algorithm for the two-dimensional hydrophobic- polar (2D HP) protein folding problem. Numerical results show that the ISA algorithm can find the known lowest-energy ground state more rapidly and efficiently than the genetic algorithm (GA) for the several given HP sequences. For the sequence with length 20, we obtain the lower-energy conformation than GA. The performance of the algorithm show ISA is an effective method for protein folding simulation

Two-dimensional preventive maintenance optimum for equipment sold with availability-based warranty

2018 ◽  
Vol 233 (4) ◽  
pp. 648-657
Author(s):  
Chun Su ◽  
Longfei Cheng
Keyword(s):  
Preventive Maintenance ◽  
Two Dimensional ◽  
Maintenance Strategy ◽  
Maintenance Policy ◽  
Numerical Example ◽  
Warranty Period ◽  
Warranty Cost ◽  
Complex Equipment ◽  
Object Of Study ◽  
Preventive Maintenance Policy

Selecting complex equipment with availability requirements as the object of study, this article investigates an availability-based warranty policy. Under this policy, apart from providing repairs or replacements upon failures, the manufacturer guarantees a negotiated availability level of products during the warranty period. In order to satisfy the availability requirement of the warranted products with rational cost, two-dimensional preventive maintenance strategy is carried out by the manufacturer, which is scheduled by considering the age and usage of the warranted items. By optimizing two-dimensional preventive maintenance strategy, this study aims to meet products’ availability requirement with the lowest cost from the manufacturer’s perspective. Moreover, customized preventive maintenance programs are designed for different customer categories. Finally, we provide a numerical example to verify the effectiveness of the proposed availability-based warranty policy. The results demonstrate that two-dimensional preventive maintenance strategy is superior in terms of warranty cost and operational availability. Meanwhile, customized preventive maintenance policy is more beneficial to both the transaction sides.

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