Ronghua Cai, Jiamei Yang, Xuemin Xu and Aiping Jiang
The purpose of this paper is to propose an improved multi-objective optimization model for the condition-based maintenance (CBM) of single-component systems which considers…
Abstract
Purpose
The purpose of this paper is to propose an improved multi-objective optimization model for the condition-based maintenance (CBM) of single-component systems which considers periodic imperfect maintenance and ecological factors.
Design/methodology/approach
Based on the application of non-periodic preventive CBM, two recursion models are built for the system: hazard rate and the environmental degradation factor. This paper also established an optimal multi-objective model with a normalization process. The multiple-attribute value theory is used to obtain the optimal preventive maintenance (PM) interval. The simulation and sensitivity analyses are applied to obtain further rules.
Findings
An increase in the number of the occurrences could shorten the duration of a maintenance cycle. The maintenance techniques and maintenance efficiency could be improved by increasing system availability, reducing cost rate and improving degraded condition.
Practical implications
In reality, a variety of environmental situations may occur subsequent to the operations of an advanced manufacturing system. This model could be applied in real cases to help the manufacturers better discover the optimal maintenance cycle with minimized cost and degraded condition of the environment, helping the corporations better fulfill their CSR as well.
Originality/value
Previous research on single-component condition-based predictive maintenance usually focused on the maintenance costs and availability of a system, while ignoring the possible pollution from system operations. This paper proposed a modified multi-objective optimization model considering environment influence which could more comprehensively analyze the factors affecting PM interval.
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The purpose of this paper is to quantitatively analyse the changes in the functional efficiency of the six Chinese agricultural futures markets and compare the relative behaviour…
Abstract
Purpose
The purpose of this paper is to quantitatively analyse the changes in the functional efficiency of the six Chinese agricultural futures markets and compare the relative behaviour of different futures markets. In addition, this paper analyses the causes of differences in the functional efficiency of agricultural futures markets and advances policy suggestions.
Design/methodology/approach
The method used in this paper is the social loss index proposed by Stein (1981, 1986). This method can quantitatively measure the functional efficiency of agricultural futures markets from the perspective of social welfare. The indicator is calculated for the 2009–2017 period and for several sub-periods. The data are from the CSMAR research data services in China.
Findings
Preliminary results suggest that the longer it takes for an agricultural futures contract to reach maturity, the lower the functional efficiency of its market. Second, the functional efficiency of the agricultural futures markets in China is improved except for that of the wheat futures market. Finally, the corn futures market is most efficient probably due to the progress of marketization, while the strong wheat futures market is most inefficient probably due to the decrease in futures market liquidity.
Originality/value
This paper uses a more reasonable method to study the functional efficiency of Chinese agricultural futures markets and then analyses the causes of differences in the functional efficiency of agricultural futures markets.
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Wenbo Li, Bin Dan, Xumei Zhang, Yi Liu and Ronghua Sui
With the rapid development of the sharing economy in manufacturing industries, manufacturers and the equipment suppliers frequently share capacity through the third-party…
Abstract
Purpose
With the rapid development of the sharing economy in manufacturing industries, manufacturers and the equipment suppliers frequently share capacity through the third-party platform. This paper aims to study influences of manufacturers sharing capacity on the supplier and to analyze whether the supplier shares capacity as well as its influences.
Design/methodology/approach
This paper deals with conditions that the supplier and manufacturers share capacity through the third-party platform, and the third-party platform competes with the supplier in equipment sales. Considering the heterogeneity of the manufacturer's earning of unit capacity usage and the production efficiency of manufacturer's usage strategies, this paper constructs capacity sharing game models. Then, model equilibrium results under different sharing scenarios are compared.
Findings
The results show that when the production or maintenance cost is high, manufacturers sharing capacity simultaneously benefits the supplier, the third-party platform and manufacturers with high earnings of unit capacity usage. When both the rental efficiency and the production cost are low, or both the rental efficiency and the production cost are high, the supplier simultaneously sells equipment and shares capacity. The supplier only sells equipment in other cases. When both the rental efficiency and the production cost are low, the supplier’s sharing capacity realizes the win-win-win situation for the supplier, the third-party platform and manufacturers with moderate earnings of unit capacity usage.
Originality/value
This paper innovatively examines supplier's selling and sharing decisions considering manufacturers sharing capacity. It extends the research on capacity sharing and is important to supplier's operational decisions.
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Ahmad Sarrafzadeh and Minou Gharehbaglou
Individuals show different environmental preferences, often influenced by their personality types. However, instances arise where the alignment of an individual’s personality and…
Abstract
Purpose
Individuals show different environmental preferences, often influenced by their personality types. However, instances arise where the alignment of an individual’s personality and the architectural environment disappears, resulting in a mismatch. Consequently, the purpose of this study considers the urgent need to acknowledge and understand the complex interplay between architecture and individual personality traits.
Design/methodology/approach
The research method is based on the correlation between the variables, which is calculated by the significant assessment of the sample population and with SmartPLS. Finally, the findings and results of the research in relation to personality components and architectural aspects indicate the existence of a relationship. In the end, this study establishes correlations among variables and conclusions are drawn through systematic logical deductions.
Findings
The research findings underscore a compelling relationship between distinct personality components and various architectural facets. Furthermore, psychological cohesiveness within distinct social cohorts emerges as a pivotal factor influencing the relationship between individuals and architecture. In this regard, the main aspects of environmental preferences (surprise, cryptic, etc.) and personality types (neuroticism, extroversion, etc.) based on their significance and the factors affecting it in sub-components, create direct or indirect relationships. Additionally, the determination of the relationships created in each of these components is specified based on Image 12, and the path of creating architectural patterns can be considered according to that.
Originality/value
The results of the research show that the correlation between personality and physical components in different social groups is an effective issue in the relationship between human and the environment. It can also be considered as a factor for improving the quality of architectural design and creating a favorable cultural atmosphere in the environment. This issue has caused a connection between architecture and human personality, which creates the ground for improving the relationship between them. Also, architecture is placed by adapting to the personality and psychological needs of people and has an effective role in the quality of their relationships in organizing and expanding the environment.