Mehdi Seifbarghy

Alzahra University · Department of Engineering

This study models a closed loop supply chain network for the Iranian engine oil market. The primary goal of the created model is to summarize tactical choices like choosing the best degree of discount and allocating the best flow of products across facilities as well as strategic decisions like selecting a supplier and finding new facilities. The t...

The Supply Chain Network Design (SCND) with perishability is an active research topic. The Agri-fresh Food Supply Chain (AFSC) is a relevant topic to SCND and this study aims to model a new AFSC for a real-world case study. Regarding the traditional AFSC, the geographically dispersed small farmers transport their products individually to the market...

Given the importance of supply chain and environmental issues, this paper presents a new mathematical model for a green closed-loop supply chain (GCLSC) network with the objectives of maximizing profits, maximizing the number of jobs created, and maximizing reliability. Due to the uncertainty on some parameters such as demand and transportation cos...

This paper considers pricing and inventory control decisions simultaneously as a hybrid production system. The hybrid production system with two recovery options, remanufacturing and refurbishing are presented. The demand follows Poisson distribution, which depends on the sale price of each product. Returned products arrive according to a Poisson p...

This paper formulates a multi-objective, multi-echelon closed loop supply chain to both minimize total supply chain costs and maximize the reliability of facilities and routes considering joint assembly center. The problem is solved utilizing two revised multi-objective solution techniques that include augmented Epsilon constraint method and multi-...

Redesigning a supply chain network is an important strategic problem which affects network productivity, especially in varying environments. We propose a novel mathematical model for redesigning the network of a real company considering economic and social aspects. Strategic decisions of the model consist of opening new centers, selecting capacitie...

Although pricing and inventory control are crucial decisions in each production system, these decisions investigate separately. This paper considers pricing and inventory control decisions simultaneously as a hybrid production system. The hybrid production system with two recovery options, remanufacturing and refurbishing are presented. The demand...

A Correction to this paper has been published: https://doi.org/10.1007/s11356-021-14245-2

In the traditional agri-fresh food supply chain (AFSC), geographically dispersed small farmers transport their products individually to the market for sale. This leads to a higher transportation cost, which is the primary cause of farmers’ low profitability. This paper formulates a traditional product movement problem in AFSC. First, the aggregate...

The growing concern over the supply chain's facilities' exposure to the intentional disruptions has been studied by incorporating the game theory into the traditional location-transportation problem. To contribute further, we add the inventory-based decisions to the former problem to minimize the maximum mean-risk damages of an optimizing interdict...

Nowadays, experts believe there are abundant sources of risks in a supply chain. An important group of risks against a supply chain is the disruption risks group, which disturbs the flow of material in the chain and may lead to inefficiency in providing the final product in the supply chain. The aim of this article is to investigate the control of...

Multi-product pipelines are a significant and extensive mean of transporting petroleum based products from refineries to distribution centers. Previous contributions on tree-like pipeline scheduling problem have considered a simple structure with a single refinery connected to a mainline and some secondary lines only emerged from the mainline. In p...

Reliability of facilities and vehicles in a supply chain and the social responsibility are of high importance in designing a supply chain network in many industries; fewer studies have studied the addressed concepts simultaneously. This paper proposes a multi-objective mixed-integer programming model for a multi-period multi-product supply chain co...

Supplier selection is a multi-criteria decision-making problem that involves both quantitative and qualitative factors. In order to select best suppliers, tangible and intangible factors, some of which lead to conflict, must be considered. The availability of discounts also complicates supplier selection problem. Over the years, several studies hav...

Vertical cooperative (co-op) advertising is one of the well-known mechanisms for coordination of supply chains. Vertical co-op advertising is a financial agreement in which a member of the chain pays certain percentage ( i.e. cooperation rate) of a subsequent member’s advertisement cost. Since increasing the number of echelons and decision variable...

A new multi-objective intermodal hub-location-allocation problem is modeled in this paper in which both the origin and the destination hub facilities are modeled as an M/M/m queuing system. The problem is being formulated as a constrained bi-objective optimization model to minimize the total costs as well as minimizing the total system time. A smal...

In this paper, we study the location of emergency centres considering cooperative and backup coverage while natural disasters occur which can result in facility disruption. In this regard, a reliable version of cooperative covering problem is presented considering two types of candidate sites, i.e., reliable and unreliable. To achieve a fortified s...

The present study is devoted to designing a three-layer supply chain including a number of plants, distribution centers, and customers, demanding for multiple products. A model is proposed in which the objective function is to maximize the profit, calculated by subtracting costs from incomes. The customers' demand is assumed to be dependent on the...

Due to high importance of supplier selection in supply chain management issues and also taking into consideration the fact that organizations are giving more and more attention to their responsibilities in the society; this paper considers supplier selection as a multi-objective decision making problem. It inserts social responsibility (SR) paramet...

In the oil supply chain, the refined petroleum products are transported by various transportation modes, such as rail, road, vessel and pipeline. The latter provides one of the safest and cheapest ways to connect production areas to local markets. This paper addresses the operational scheduling of a multiproduct tree-like pipeline connecting severa...

This paper focuses on determining ordering and pricing policies in a single-period closed-loop supply chain. The assumed supply chain includes a number of manufacturers who provide their different, yet substitutable, products for their customers via a common retailer; however, manufacturers can have their own internet-based sales channels in order...

Closed-loop supply chain design is used to provide an optimal platform for efficient and effective supply chain management. It is an essential and strategic operation management problem in supply chain management and, usually, includes multiple and conflicting objectives. A new mixed integer non-linear programming model for a multi-objective closed...

The concept of sustainability in supply chain management refers to a logical balance between economic development, environmental considerations, and social responsibilities. In this paper, a sustainable model has been proposed to design a supply chain network in textile industries considering the key environmental and social factors. Regarding the...

The majority of the studies on the integrated vendor-buyer inventory problem assume that the shipments are equal. In this paper, shipments are considered to be non-equal. Both demand and delivery times are also assumed to be stochastic. Moreover, unsatissed demand can be backordered and lost, and a service level constraint is considered. The object...

This paper analyses the bullwhip effect in single product supply network topologies, operated with linear and time-invariant inventory management policies and shared supply network information, considering exogenous uncertainty. Information sharing is determined as the degree of coordination across the supply network. Exogenous uncertainty (e.g., t...

The efficiency of a supply chain can be extremely affected by its design which includes determining the flow pattern of material from suppliers to costumers, selecting the suppliers, and defining the opened facilities in network. In this paper, a multi-objective multi-echelon multi-product supply chain design model is proposed in which several supp...

In the current competitive market, obtaining a greater share of the market requires consideration of the customers' preferences and meticulous demands. This study addresses this issue with a queuing model that uses multi-objective set covering constraints. It considers facilities as potential locations with the objective of covering all customers w...

This paper proposes an integrated approach for dynamic facility layout problem considering the material handling equipment (MHE). The objectives of this problem are minimization of the fixed costs of MHE, minimization of material handling cost (MHC) and minimization of machine rearrangement costs (MRC). To be more realistic, MHE fixed costs, MRC an...

In this paper, we propose a location-allocation model with two objectives including minimizing the establishment cost of facilities and minimizing the waiting time of customers. We assume two types of servers providing primary and secondary services at each facility. The number of servers of each type is known and they should be allocated to facili...

This paper presents a model for the location of facilities subject to congestion. Motivated by applications to locating servers in communication networks, bank branches, automatic teller machines (ATMs), and police services centres in order to ease the access of customers to service centres and to reduce total costs of both customers and service pr...

Many scholars have already investigated the location problem of supply chain facilities and centres under different conditions. In a three-echelon multiple commodity supply chain, the aim is to fulfil customer demand at a minimum cost by optimising the flow of products from factories to distribution centres (DC) and from DCs to customers. In a situ...

The aim of this paper is to extend research results published in two recent papers which had investigated single-vendor single-buyer inventory model with lost sales and discrete delivery orders and a model in which a single buyer orders a product from multiple vendors who deliver their products to the buyer as joint shipments. We extend the two mod...

The stochastic process is one the most important tools to overcome uncertainties of supply chain problems. Being a lack of studies on constrained reliable facility location problems (RFLP) with multiple capacity levels, this paper develops a bi-objective RFLP with multiple capacity levels in a three echelon supply chain management while there is a...

This paper formulates a two-echelon single-producer multi-buyer supply chain model, while a single product is produced and transported to the buyers by the producer. The producer and the buyers apply vendor-managed inventory mode of operation. It is assumed that the producer applies economic production quantity policy, which implies a constant prod...

In this paper, a new model is developed considering diversity of service in service centers location problem. It is assumed that different services can be provided at each service center. The model has three objective functions including: minimizing the sum of customers travel time and waiting time in service centers, balancing service loads among...

Often, companies deliberately fulfill demands with delay since they can benefit from reducing transportation and setup costs. This paper aims at designing a four-echelon supply chain structure including multiple suppliers, multiple producers, multiple distributors and multiple customers. The objectives are to minimize the total operating costs of a...

This paper addresses a reliable facility location problem in which the possibility of facility disruption is considered. There are two types of candidate sites which differ from the reliability aspects. A combination of cooperative and backup coverage concepts are considered. It is assumed that customers can be covered by a combination of reliable...

This paper studies a multi-objective production–distribution system. The objectives are to minimize total costs and maximize the reliability of transportations system. Each transportation system is assumed to be of unique reliability. In the real world, some parameters may be of vagueness; therefore, some tools such as fuzzy logic is applied to tac...

This study addresses the single-product joint vendor-buyer lot-sizing problem with normal and empirical distributions for demand and delivery time respectively. A service level constraint is assumed for the buyer in which unsatisfied demand might be lost or backordered. The vendor produces products at a certain rate and as a fraction of the receive...

Cell manufacturing as an application of group technology increases the flexibility and efficiency of the production. Cell scheduling problem, one of the subjects in cell manufacturing, has not been widely studied by researchers compared with other problems in cell manufacturing. In spite of great importance of material handling in cell scheduling,...

In this paper, a special case of inventory routing problem, in which a distribution centre as the supplier distributes a single product to a set of sales-points using economic order quantity policy to manage inventories, is investigated. A fleet of homogeneous vehicles, each with a given capacity, is available for delivery of inventory to the sales...

The inventory system under consideration consists of one central warehouse and a few non-identical retailers controlled by a continuous review inventory policy ( ). The retailers face an independent Poisson demand. Order transportation time from the central warehouse to each retailer is assumed to be constant. Also, the lead time for replenishing o...

One of the interesting subjects in supply chain management is supply management, which generally relates to the activities regarding suppliers such as empowerment, evaluation, partnerships and so on. A major objective of supplier evaluation involves buyers determining the optimal quota allocated to each supplier when placing an order. In this paper...

IT/IS represents a substantial financial investment for many organizations. Making IT project portfolio decision is difficult, because long lead times of IT project and market and technology dynamics lead to unavailable and unreliable collected data for portfolio management. This uncertainty has been modeled using fuzzy concepts. We need a collectiv...

Recently studies in area of supply chain network (SCN) have focused on the disruption issues in distribution systems. Also this paper extends the previous literature by providing a new biobjective model for cost minimization of designing a three echelon SCN across normal and failure scenarios with considering multi capacity option for manufacturers...

This paper provides a framework in order to incorporate reliability issue as a sign of disruption in distribution systems and partial covering theory as a response to limitation in coverage radios and economical preferences, simultaneously into the traditional literatures of capacitated facility location problems. As a result we develop a bi-object...

This paper formulates a two-echelon single-vendor multi-buyer supply chain model assuming unsatisfied demand at the vendor to be backordered. The vendor and buyers apply Vendor Managed Inventory (VMI) mode of operation. The vendor gives the product to the buyers. The operational parameters are sales quantity, sales price and maximum number of stock...

Competitive location deals with the problem of locating new facilities to provide a service (or goods) to the customers of a given geographical area where other facilities (competitors) offering the same service are already present. The new facilities will have to compete with the existing facilities for capturing the market share. This paper propo...

Due to the importance of supplier selection issue in supply chain management (SCM) and ,also, the increasing tendency of organizations to their social responsibilities, In this paper, we survey the supplier selection issue as a multi objective problem while considering the factor of corporate social responsibility (CSR) as a mathematical parameter....

Suppliers’ evaluation is a subject, which has attracted the attention of many researchers. The performance of potential suppliers is evaluated against multiple criteria rather than considering a single factor such as cost or quality. One of the major objectives of suppliers’ evaluation is to determine the optimal quota assigned to each supplier whi...

The research on supplier selection is abundant and the works usually only consider the critical success factors in the buyer–supplier relationship. However, the negative aspects of the buyer– supplier relationship must also be considered simultaneously. In this paper we propose a comprehensive model for ranking an arbitrary number of suppliers, sel...

One of the initial researches on supply risk criteria in a supply chain is that of Kraljic. This research gives a method to classify supplied items into four categories in terms of risk and price share and presents a set of strategies to supply the items of each category. Although the addressed research gives some criteria to measure supply risk bu...

Supply Chain Operations Reference (SCOR) model is developed and maintained by the Supply Chain Council (SCC). The model is a reference model which can be used to map, benchmark and improve the supply chain operations. SCOR model provides companies with a basic process modeling tool, an extensive benchmark database and defines a set of supply chain...

A network of several demand nodes is considered. We want to locate a number of multiserver facilities at some nodes assuming at least one server must be located at each node. Accordingly, the number of servers has to be more than the nodes number. We propose a model for locating these facilities from customers’ perspective in such a way as to minim...

Some servers are to be located at nodes of a network. Demand for services of these servers is located at each node and a subset of the nodes is to be chosen to locate one server in each. Each customer selects a server with a probability dependent on distance and a certain amount of benefit is achieved after giving service to the customer. Customers...

The inventory system under consideration consists of one central warehouse and an arbitrary number of non-identical retailers controlled by continuous review policy(R,Q). It is assumed Independent Poisson demands with constant transportation times for the retailers and constant lead time for replenishing orders from an external supplier for the war...

Supply Chain Operations Reference (SCOR) model is developed and maintained by the Supply Chain Council (SCC). The model is a reference model which can be utilized to map benchmark and improve the supply chain operations. SCOR model provides companies with a basic process modeling tool, an extensive benchmark database by defining a set of supply cha...

This paper considers a single-item, two-echelon, continuous-review inventory model. A number of retailers have their stock replenished from a central warehouse. The warehouse in turn replenishes stock from an external supplier. The demand processes on the retailers are independent Poisson. Demand not met at a retailer is lost. The order quantity fr...

The inventory system under consideration consists of one central warehouse and an arbitrary number of retailers controlled by a continuous review inventory policy (R,Q). Independent Poisson demands are assumed with constant transportation times for all retailers and a constant lead time for replenishing orders from an external supplier for the ware...

The inventory system under consideration consists of one central warehouse and many identical retailers controlled by continuous review inventory policy (R,Q). We assume independent Poisson demands with constant transportation times for the retailers and a constant lead time for replenishing orders from an external supplier for the warehouse. Unsat...