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International Journal of Management Science and Engineering Management (17509653) 19(1)pp. 56-66
In the present research, the local and global dynamic advertising and competitive pricing are considered in the form of an integrated differential game model in the dual-channel supply chain of a coffee processing company. Furthermore, integrated mathematical analyses are presented to examine the equilibrium paths of the game. One of the main novelties of this study is to consider the state variable as the amount of credibility that is given to the customer by the global advertising of the manufacturer. According to the results, the equilibrium price of online sales is higher than the retail price. Furthermore, the advertisement volume of the manufacturer in the online channel is more than the local advertisement volume of the retailer, and the advertisement volume of the retailer is more than the global advertisement volume of the manufacturer. In this case, the profit of the manufacturer in the online channel is always more than the profit of the retailer in the traditional retail channel. Therefore, activities of the direct online channel can lead to an increase in profits, however, the conflict of channels could reduce the demands through the traditional retail channel. The sensitivity of equilibrium levels of optimal variables are also analyzed. © 2022 International Society of Management Science and Engineering Management.
Journal of Modelling in Management (17465672) 18(2)pp. 285-317
Purpose: This paper aims to minimize the total carbon emissions and costs and also maximize the total social benefits. Design/methodology/approach: The present study develops a mathematical model for a closed-loop supply chain network of perishable products so that considers the vital aspects of sustainability across the life cycle of the supply chain network. To evaluate carbon emissions, two different regulating policies are studied. Findings: According to the obtained results, increasing the lifetime of the perishable products improves the incorporated objective function (IOF) in both the carbon cap-and-trade model and the model with a strict cap on carbon emission while the solving time increases in both models. Moreover, the computational efficiency of the carbon cap-and-trade model is higher than that of the model with a strict cap, but its value of the IOF is worse. Results indicate that efficient policies for carbon management will support planners to achieve sustainability in a cost-effectively manner. Originality/value: This research proposes a mathematical model for the sustainable closed-loop supply chain of perishable products that applies the significant aspects of sustainability across the life cycle of the supply chain network. Regional economic value, regional development, unemployment rate and the number of job opportunities created in the regions are considered as the social dimension. © 2021, Emerald Publishing Limited.
International Journal of Process Management and Benchmarking (14606739) 13(1)pp. 145-156
Lean Six Sigma (LSS) is an effective quality improvement program. The deployment of LSS in organisations is done with significant investment as it has many benefits. As to higher education institutes (HEIs), this system has not been applied in the manner it should be. Identifying an appropriate project requires a precise analysis of the data to make all the selected projects in line with the organisation strategy objectives, and with the least uncertainty rate in implementation. Actually, the concern is not merely the application of LSS, but also the successful implementation of the best improving project. In this study, 133 main processes were identified in the determined four zones of the University of Isfahan, and assessed using the five Lean Six Sigma indicators clustered in SPSS Clementine 12.0 S/W based on the viewpoints of the managers and professionals of the zones. 19 out of 133 processes were found critical, with higher priorities in defining the Lean Six Sigma projects. While clustering is an appropriate approach for the identification of higher education institutes, it is not possible through the common methods. Based on the evaluation of the involved managers and professionals, the proposed approach is efficient, practical, and dynamic. Copyright © 2023 Inderscience Enterprises Ltd.
JOURNAL OF INDUSTRIAL AND PRODUCTION ENGINEERING (21681015) 40(5)pp. 360-374
This study addresses the optimization of price and production quantity using game theory in the coffee supply chain in the city of Isfahan. The presented model focuses on the competition among members of the chain in a probabilistic environment and is based on discrete selection models. This model examines the impact of inventory and routing costs on the pricing model at the same time. To effectively solve real-world problems, the method of normal distribution approximation is used instead of the binomial distribution. The results of the model indicate that the computational time of the applied approximate model does not change with increasing the number of customers, and the model can determine the optimal price and production quantity. The advantage of the proposed model over other classic models is that it considers the inventory costs that have not yet been considered in price competition models with discrete selection.
Sustainable Production and Consumption (23525509)
Appropriate supplier selection due to its direct impact on profitability and maintaining the competitive status of an organization is one of the vital decisions for each company. Data envelopment analysis (DEA) is a proper tool for measuring the sustainability of suppliers. Classic DEA models suppose that inputs and outputs are deterministic; consequently, the relative efficiencies of suppliers are also deterministic. However, in real-life applications, all inputs and outputs are not deterministic. Some could be stochastic and/or fuzzy. This study consists of four types of supplier selection models in supply chains and provides a decision making scheme for selecting appropriate model for supplier selection under deterministic, stochastic and fuzzy conditions. The proposed stochastic-fuzzy DEA model (SFDEA) can be solved as crisp program for each α∈01 using α-cut method. This is the first study to a present a flexible approach for evaluating supplier's sustainability in supply chain management. A case study is presented for validating the proposed model. © 2019
Economic Research-Ekonomska Istrazivanja (1331677X) (1)
Nowadays, companies are able to obtain the key to success in global competition by choosing the right suppliers who are more align with their strategies. It is clear that applying appropriate attitudes and criteria have a great importance in choosing suppliers in the process of decision-making by chain managers and especially purchasing managers. In this study tried to apply Lean, Agile, Resilient and Green (L.A.R.G.) approach in a model designed to select the consistence supplier. Accordingly, at first, while reviewing and exploiting the literature, the most main logistics needs of the company concerned in the light of the objectives that followed on the fields of the LARG attitudes, are refined and selected, then their degree of significance is determined through Multi-Objective Performance Analysis (M.O.P.A.). The house of quality (H.O.Q.) matrix is applied to determine the importance degree of the technical characteristics of the suppliers and Taguchi loss function is applied to determine the degree of their performance deviation from the target value in each one of the technical characteristics (ultimate judgment about their competency). The considered suppliers are ranked based on the results of the loss function analysis. A sensitivity analysis was conducted to analyse the impact of different conditions on suppliers’ ranking and validation of the ranking results were Satisfied by applying the T.O.P.S.I.S. method. © 2019, © 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
International Journal of Services and Operations Management (17442370) 31(1)pp. 77-97
The aim of this paper is to determine the priorities of product development strategies with respect to its supply chain flexibility in Esfahan Steel Co. For this purpose, attributes of supply chain flexibility have been extracted from literature and investigated in Esfahan Steel Co. Their weights have been calculated using multiple attribute decision making (MADM) techniques. Finally, product development strategies have been prioritised. According to the findings, the four priorities included the production of special rolled products, the production of special alloy steel ingots, the production of wide flange beam (size 24–30) and the production of rails strategies, respectively. Copyright © 2018 Inderscience Enterprises Ltd.
Journal of Internet Banking and Commerce (12045357) (Special Issue 5)
Purpose: Today, organizations are faced with unique challenges in the customers’ service sector. The current study intends to design the process of providing electronic services with the choice of electronic banking service for testing the proposed approach (using Quality Function Deployment). Design/methodology/approach: In this regard, a four-stage approach based on quality home design was used, which initially relates the needs of customers from bank electronic services to basic requirements of these services, and finally extends them to physical conditions and characteristics of equipment required for this category of services. The data needed in the study process were collected by the 196 customers or the QFD team and validated by content analysis. Findings: This article is an introduction to the relations between the most important factors of service providing process design in electronic banking industry. The study discussed and supports the requirement for creating the infrastructure needed to electronic banking which is aligned with the needs of bank customers. In this case study, after performing the calculations of QFD tables, the relative weights of identified indicators were obtained. Accordingly, among the customers’ needs, the need for security and information confidentiality had the utmost importance. The index of being economic had the highest priority in the Table 1. The indices of confidentiality and performance with equal weights had the best priorities in the Table 2. The indices of approving the transactions and orders and ease of use with an equal weight had the highest priorities in the Table 3. Finally, the indices of updating and systems development had the best priorities in the QFD has Table 4. Originality/value: In this study the new way for process planning of electrical banking service has adopted to have more accurate prioritization of customer needs. The road of designing have extended from customers’ needs and functions of e-banking services to the dimensions of service quality, e-banking services features and terms indicators of providing banking e- services. In fact the study seeks to explain and differentiation of the key concepts involved in the design of service process and Service designer should have special attention to prioritize of these factors. © Dariush Mohamadi Zanjirani, 2016.
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