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1 |
Multi-objective optimization modelling of sustainable green supply chain in inventory and production management
مدلسازی چند هدفه بهینه سازی زنجیره تأمین سبز پایدار در مدیریت موجودی و تولید-2021 The ever increasing pressure to conserve the environment from global warming cannot
be overemphasized. Emission from the inventory and production process contributes immensely
to global warming and hence, the need to device a sustainable green inventory by the operational
managers. In this paper, a multi-item multi-objective inventory model with back-ordered quantity
incorporating green investment in order to save the environment is proposed. The model is formulated as a multi-objective fractional programming problem with four objectives: maximizing profit
ratio to total back-ordered quantity, minimizing the holding cost in the system, minimizing total
waste produced by the inventory system per cycle and minimizing the total penalty cost due to green
investment. The constraints are included with budget limitation, space restrictions, a constraint on
cost of ordering each item, environmental waste disposal restriction, cost of pollution control, electricity consumption cost during production and cost of greenhouse gas emission in the production
process. The model effectiveness is illustrated numerically, and the solution obtained to give a useful
suggestion to the decision-markers in the manufacturing sectors.
KEYWORDS: Multi-objective fractional programming | Fuzzy goal programming | Sustainable green supply chain | Inventory and production management |
مقاله انگلیسی |
2 |
Inventory management in blood supply chain considering fuzzy supply/demand uncertainties and lateral transshipment
مدیریت موجودی در زنجیره تأمین خون با توجه به عدم قطعیت عرضه / تقاضای فازی و حمل و نقل جانبی-2021 Supply and demand uncertainties combined with very short lifetime of blood platelets has led to significant wastage of the total blood collected from the donors. Conversely, great shortage of platelets may be obtained due to the limited number of donors and emergency demands. Therefore, it is of utmost importance to develop appropriate inventory management model to simultaneously minimize both shortage and wastage along the blood supply chain. To achieve this purpose, this paper presents an Inventory Management model for Age- differentiated platelets under supply/demand Uncertainties (IMAU) for Blood Supply Chains with Lateral Transshipment (BSCLT), resulting a new model named IMAU-BSCLT. The proposed model is solved using whale optimization algorithm considering the costs of ordering from blood centers and lateral transshipment, transportation, inventory holding, shortage, and wastage. In order to validate the proposed methodology, a case study of blood supply chain is used to show the usability of the proposed model and claim its benefits over existing models. Simulation results demonstrate that lateral transshipment between different demand nodes has a major impact on load balancing leads to simultaneously reduce both shortage and wastage costs. According to the obtained results, shortage rate (total shortage per total demands) and wastage rate (total wastage per total supply) of the proposed method are 3.4 % and 4.8 %, respectively. Keywords: Blood supply chain | Inventory management | Blood platelet | Lateral transshipment | Fuzzy uncertainty |
مقاله انگلیسی |
3 |
The influence of online review adoption on the profitability of capacitated supply chains
تأثیر پذیرش بازبینی آنلاین بر سودآوری زنجیره های تأمین خازنی-2021 The paper explores the influence of online review adoption on supply chain profitability
under the presence of a capacity constraint. Nowadays, customers increasingly rely on online
reviews for decision making, and online retailers regard reviews as a norm. Although online
reviews have been extensively examined in marketing disciplines, little research has been
conducted to investigate their influence from a supply chain perspective. In addition, previous
research has largely focused on how online review information can influence customer
purchase behaviours, but ignores the more basic decision: whether and when companies
should adopt reviews. This paper examines the online review adoption decision from a
capacitated supply chain perspective through mathematical modelling and simulation. The simulation considers the influence of variables including online review adoption decisions,
capacity constraint level, lost sales penalty level and product quality estimation on supply
chain profitability. Generally, we find that online reviews can bring more profit to the supply
chain than without online reviews, although such influence is moderated by the other three
variables. The findings reveal the complexity of the contextual variable impacts on online
review adoption, and demonstrate that decisions concerning the adoption of online reviews
should take all supply-chain-related variables into consideration rather than only aiming for
increasing customer orders.
Keywords: Online reviews | supply chain | capacity constraint | simulation | inventory management |
مقاله انگلیسی |
4 |
The influence of online review adoption on the profitability of capacitated supply chains
تأثیر پذیرش بازبینی آنلاین بر سودآوری زنجیره های تأمین خازنی-2021 The paper explores the influence of online review adoption on supply chain profitability
under the presence of a capacity constraint. Nowadays, customers increasingly rely on online
reviews for decision making, and online retailers regard reviews as a norm. Although online
reviews have been extensively examined in marketing disciplines, little research has been
conducted to investigate their influence from a supply chain perspective. In addition, previous
research has largely focused on how online review information can influence customer
purchase behaviours, but ignores the more basic decision: whether and when companies
should adopt reviews. This paper examines the online review adoption decision from a
capacitated supply chain perspective through mathematical modelling and simulation. The simulation considers the influence of variables including online review adoption decisions,
capacity constraint level, lost sales penalty level and product quality estimation on supply
chain profitability. Generally, we find that online reviews can bring more profit to the supply
chain than without online reviews, although such influence is moderated by the other three
variables. The findings reveal the complexity of the contextual variable impacts on online
review adoption, and demonstrate that decisions concerning the adoption of online reviews
should take all supply-chain-related variables into consideration rather than only aiming for
increasing customer orders.
Keywords: Online reviews | supply chain | capacity constraint | simulation | inventory management |
مقاله انگلیسی |
5 |
Two-echelon supply chain network design with trade credit
Two-echelon supply chain network design with trade credit-2021 This study considers a two-echelon supply chain that is comprised of an outside vendor, multiple distribution centers (DCs), and multiple retailers. The retailers have access to trade credit offered by upstream suppliers. We propose an integrated DC-retailer network design model that optimizes trade credit terms and safety stock levels, in addition to the decisions of DC locations, DC-retailer assignments, and inventory replenishment policies typically considered in the literature. The operating and handling cost is concave and non-decreasing to capture economies of scale whereas most existing studies simply assume that such cost is linear in demand. Trade credit financing cost is characterized in a way that preserves the important mathematical structure of the classic warehouse retailer network design model. Leveraging on the sub modularity property of the cost components, we developed a polymatroid cutting-plane solution algorithm, which is effective for practically sized problem in- stances in numerical experiments. The results show that incorporating trade credit financing into supply chain network design may substantially reduce the total cost. Further, our study suggests a more consolidated supply chain network when either the safety stock or financing cost increases. Interestingly, as financing cost rises, a high-volume and low-frequency reorder pattern is favored, but the opposite is recommended when financing gain increases. The variation of each individual cost component is also analyzed for an in-depth understanding of the impact of operational and financial parameters on supply chain optimization. Keywords: Network design | OWMR system | Multi-echelon inventory management | Trade credit | Polymatroid cutting plane |
مقاله انگلیسی |
6 |
Changing the game to compete: Innovations in the fashion retail industry from the disruptive business model
تغییر بازی برای رقابت: نوآوری در صنعت خرده فروشی مد از مدل کسب و کار مخل-2020 Unprecedented competition and emergent technologies have posed a
challenge to many traditional retailers in recent years. Yet within this competitive
environment, emerging innovative business models have thrived and successfully
disrupted the industry. We analyze the nature of disruptive business-model innovations and the ways they disrupt the fashion retail industry. To that end, we examine
three disruptors in the industry: born-digital brands, AI-enabled demand forecasting and product design, and collaborative consumption. After introducing the
concept of disruptive business-model innovation, we discuss the three disruptors’
effects on the fashion industry. We find that all of these models keenly answer
fundamental needs unmet by current business models, such as offering quality
products at a competitive price, curated services, and sustainable consumption.
At the same time, all three disruptors suggest effective operation models for
handling demand uncertainty, inventory management, and timely responses to
the market, all of which are inherent issues for current push supply chains and
forecast-based, inventory-driven systems. Based on this analysis, we discuss important implications for both academics and industry practitioners.
KEYWORDS: Disruptive innovation | Business model | Inventory management | Demand forecasting | Fashion industry | Online retail |
مقاله انگلیسی |
7 |
Identifying inventory project management conflicts: Results of an empirical study
شناسایی تضادهای مدیریت پروژه موجود : نتایج یک مطالعه تجربی-2020 Although conflicts are being studied in many different management fields there seems to be a rather restricted
number of studies on inventory management-related conflicts and it is for this reason why we conducted a study
on exploring the different types of conflicts, their causes and the emerging character of conflicts during the
shaping, implementation and usage of inventory systems. In doing so, a framework for assessing different types
of conflicts is taken as a starting point. From our case studies, it can be concluded that each of the archetypical
conflicts addressed in our framework manifested itself in the companies studied. Our exploratory case studies
strongly indicates that during the process of redesigning and implementing improvements inventory management
conflicts can evolve in time. Furthermore, in almost all companies studied, the identified conflicts had a
multidimensional character and were a mix of the archetypes addressed in our theoretical framework. For project
managers it seems to be important to be aware of the different potential conflicts that might arise during the
course of inventory projects. The results presented in this article may therefore help project managers to guide
projects in the area of inventory management more effectively. Keywords: Inventory management | Conflicts | Case study | Typology | Stakeholders |
مقاله انگلیسی |
8 |
Product assortment and space allocation strategies to attract loyal and non-loyal customers
مجموعه ای از محصولات و استراتژی های تخصیص فضا برای جذب مشتری های وفادار و غیر وفادار-2020 Assortment planning deserves much attention from practitioners and academics due to its direct impact on retailers’ commercial success. In this paper we focus on the increasingly popular retail practice to use combined product assortments with both “standard”and more fashionable and short-lived “variable”products for building up store traffic of “loyal”and “non-loyal”heterogeneous customers and enlarging the sales due to the potential cross-selling effect. Addressing the assortment planning as a bilevel optimization problem, we focus on decision-dependent uncertainties: the retailer’s binary decision about product inclusion influences the distribution of the product’s demand. Furthermore, our model accounts for customers’ optimal purchase quantities, which depend on budget constraints limiting the basket that a customer is able to purchase. We propose iterative heuristics using optimal quantization of demand and customers budget distributions to define the total assortment and the inventory level per product. These heuristics provide lower bounds on the optimal value. We conduct a comparison to other existing lower bounds and we formulate upper bounds via linear (LP) and semidefinite (SDP) relaxations for the performance evaluation of the heuristics and for an efficient numerical solution in high-dimensional cases. For managerial insights, we compare the proposed approach with three assortment planning strategies: (1) the retailer does not carry variable products; (2) the retailer ignores the cross-selling effect; and (3) the maximum space allocated to each product is fixed. Our results suggest that variable assortment boosts the retailers profits if the cross-selling effect is not neglected in the decision about products quan- tities. Keywords: OR in marketing | Assortment planning | Inventory management | Bilevel optimization | Stochastic optimization |
مقاله انگلیسی |
9 |
تجارت الکترونیک با استفاده از تجمیع و جهانی سازی مدیریت زنجیره تامین
سال انتشار: 2018 - تعداد صفحات فایل pdf انگلیسی: 3 - تعداد صفحات فایل doc فارسی: 7 از تامینکنندگان از طریق مونتاژ و پخش خریدار، مدیریت زنجیره تامین (SCM) به اجتناب از اداره مواد میپردازد و با استفاده از دادهها به پشتیبانی از شبکه تولید میپردازد. SCM با مدیریت سر و کار دارد و جریانهای اقلام را تغییر میدهد به عبارتی دیگر به مراقبت از مرجوعات مشتری و استقاده مجدد از اقلام دور انداخته شده میپردازد. SCM عمدتا با موجودی سر و کار دارد و به مدیریت موجودی کالا در نواحی مختلفی میپردازد که این نواحی باید به شکلی مرتب هماهنگ شوند و برای شرکتهای مختلف به هماهنگی مواد خام، تراکنشهای مالی و دادهها میپردازد. بنا به دلایل مختلفی SCM در طی سالها هواداران زیادی پیدا کرده است. حرکتی که توسط یک فرد انجام میشود میتواند تاثیر بالایی در SCM داشته باشد که این موضوع برای مدیران حوزه کسب و کار به خوبی شناخته شده است. از موجودی به شبکههای رقابتی، رقابت شرکتها با یکدیگر با ایجاد هم چشمی ایجاد شده است. برای توسعه، شرکتها ضایعات را تخریب میکنند و با ارائهدهندگان و مشتریان برای خدماتی بهتر هماهنگ میشوند.
کلمات کلیدی: مدیریت زنجیره تامین (SCM) | شبکه تولید | مواد خام. |
مقاله ترجمه شده |
10 |
Bank credit and corporate working capital management
اعتبار بانکی و مدیریت سرمایه در گردش شرکت-2018 We investigate how changes in the availability of bank credit influence how public firms man
age their working capital, which is essential to their operations. In doing so, we provide an en
hanced understanding of what significantly influences corporate working capital management.
We find that changes in the availability of bank credit significantly influence a number of as
pects of a firms working capital policies, and these effects often differ across firms that are
more or less dependent on bank financing. Interestingly, our evidence points to the importance
of the changing mix of U.S. companies for working capital practices.
Keywords: Bank credit ، Working capital management ، Cash management ، Inventory management ،Trade credit ، Supply chain financing |
مقاله انگلیسی |