Ahmad Jafarnejad

• Doctor of Philosophy
• Full Rrqfessor at University of Tehran

Introduction and objectives: In today's world, accessibility and security of banking services for all members of society, particularly vulnerable groups such as the blind, are of utmost importance. With the increasing significance of digital banking, identifying and assessing risks related to accessibility and security of banking services for the b...

This study aims to apply automatic machine-learning approaches using genetic algorithms to enhance heart disease prediction. Heart disease has remained the major cause of mortality in the world, necessitating an effective and timely diagnosis. Most current diagnostic and assessment processes are lengthy and expensive, relying heavily on clinical ex...

Objective:This study seeks to explore and compare ensemble learning models for more accurate predictions of students’ national ranks in Iran’s nationwide university entrance examination, commonly known as the Konkur. The primary aim is to identify optimal models capable of predicting students’ ranks with the highest precision by analyzing data from...

Purpose: The supply chain of cellophane includes an independent set of parts whose relationship has to be properly managed to ascertain efficiency, performance, and sustainability. This research aims to provide detailed information regarding the cellophane supply chain and, using the Supply Chain Operations Reference model, act as a benchmark to en...

Professor Spyros Vliamos writes a preface as a theoretical support to the analysis which follows. This text considers local developing issues in an international context and makes proposals as to what must be changed in theory and policy. This model makes what follows more understandable and science proof and allows readers to make his/her own rema...

In emergency situations, accurate demand forecasting for relief materials such as food, water, and medicine is crucial for effective disaster response. This research is presented a novel algorithm to demand forecasting for relief materials using extended Case-Based Reasoning (CBR) with the best-worst method (BWM) and Hidden Markov Models (HMMs). Th...

Today, as the Competitive Environment becomes more Complicated, Firms in Steel Value Chain Sector, in addition to the need to Identify and Assimilate new Knowledge and Technologies, need to Absorb and Integrate It into their Technological Resources.This Study has been done by Analyzing the Iran Steel Value Chain Technology Developments from the Per...

Purpose: The purpose of this paper is to demonstrate systematic application of grounded theory to understand strategic agility in knowledge-based companies (KBCs) in Iran and to explain relationships between them.Methodology: This study uses mixed methods research to explore the determinants of strategic agility in KBCs. This study uses mixed metho...

Every day, an abundance of perishable materials and products are transferred from suppliers to producers, as well as from producers to retailers. In the meantime, operating costs, transportation costs, and environmental impacts enhance due to the limited lifespan of dairy products, time constraints, limited inventory to hold, and high frequency of...

Summary in: https://www.researchgate.net/publication/373776116_GEOPOL_PROFILE_090923

In recent years, the relationship between the concepts of operations management and finance management has been an attractive area of research among researchers. One of the emerging areas at the beginning of the 21st century in the literature of operations and supply chain management is the topic of supply chain finance (SCF). SCF is a new concept...

One of Iran's problems in the production of common oil and gas fields is unequal extraction. Therefore, the production of common oil and gas fields in onshore and offshore is essential for Iran, so this must carefully monitor, which can be considered as a game-liked approach, that each player tries to increase its payoff. Therefore, the purpose of...

This paper provides a mathematical model to analyse the impact of a negative corporate social responsibility (CSR) parameter that for ‘forced labour’, on supply chain profitability based on coordination contracts. Four types of supply chain coordination contract are developed and benchmarked against set performance indices employing sensitivity ana...

In the design of the supply chain, the use of the returned products and their recycling in the production and consumption network is called reverse logistics. The proposed model aims to optimize the flow of materials in the supply chain network (SCN), and determine the amount and location of facilities and the planning of transportation in conditio...

To cooperate or not is one of the most challenging issues of supply chain management era. If the supply chain is managed optimally, the entire profitability increases. Meanwhile, corporate Social Responsibility (hereafter CSR) is defined as the social and ethical behavior of supply chain members against stakeholders such as shareholders, final cust...

Happening various crisis on efficiency and effectiveness of enterprises and organizations supply chain, has made organizational researchers and expertise so willing for more attention and studies on the concept of risk in supply chain and how to confronting with that. Resiliency and its strategies are one of the newest concept in supply chain is as...

Purpose Medical equipment’s supply chains play a vital role in performance of national 1healthcare systems. This supply chain is confronted with different internal and external risks. The purpose of this study is to investigate and find the key factors affecting the resilience of the supply chain of medical equipment and to examine the dynamic rela...

The purpose of this study is to provide a model of trust building process in the country's relief network considering the importance of establishing trust in the supply chain of humanitarian services as well as theoretical poverty in the field of trust building. Thus, three major recent events in Tehran province have been selected as a case study....

Purpose The purpose of this paper is to identify critical equipment by dynamically ranking them in interval-valued intuitionistic fuzzy (IVIF) circumstances. Accordingly, the main drawbacks of the conventional failure mode and effects analysis (FMEA) are eliminated. To this end, the authors have presented the interval-valued intuitionistic fuzzy co...

In the business world today, intense competition among the firms forces them to operate under conditions of uncertainty which, in turn, gives rise to numerous risks that can negatively impact the supply chain and lower profitability and competitive advantage. Expansion and density of communication network in the supply chain, on the one hand, and i...

In the last decades, increasing in human and natural disaster occurrence, had very irreparable effects on human life. In order to relieve the consequences of disasters, improving in accuracy and reliability of the demand forecasting system can be a suitable solution because the demand prediction on emergency resources is the premise and basis of op...

The nature and complexity of today’s supply chains have predisposed them to various risks, which are described under different terms, including disturbances, uncertainties and riots. Under these conditions, organizations are required to manage their supply chain in a way that is responsive to changes. The purpose of this study is to analyze the rel...

Suitable project manager has a significant impact on successful accomplishment of the project. Managers should possess such skills in order to effectively cope with the competition. In this respect, selecting managers based on their skills can lead to a competitive advantage towards the achievement of organizational goals. selection of the suitable...

According to the system of Just-in-time (JIT), the criterion of due date is as one of the important factors in competition among manufacturing companies in that customers expect goods will be delivered to them in a specific time. The major purpose of this study is optimizing the orders at supply chain (SC). In order to maximize the profitability, M...

In this paper, we propose a novel approach for constructing a preference fuzzy distance measure. For this purpose, we propose a new and effective preference ordering based on the Abbasbandy and Hajjari's approach [2].

Failure mode and effects analysis (FMEA) is a widely used engineering technique for designing, identifying and eliminating known and/or potential failures, problems, errors and so on from system, design, process, and/or service before they reach the customer. In a typical FMEA, for each failure Modes, three risk factors; severity (S), occurrence (O...

Firms that invest in R&D and at the same time in worker skills (on-the-job training) expected to be more successful in innovation. In competitive world many companies are trying to get good success between their rivals. Companies owners wants to optimize their cost and manage it to achieve to proper level of cost and expenses. One of important fact...

This research provides an optimization tool for use by supply chain managers in the design and operation of manufacturing- distribution networks under uncertain demand conditions. The problem under consideration consists of determining the supply chain infrastructure; raw material purchases, shipments, and inventories; and finished product producti...

Competitive environment of today’s organizations, more than ever, is extensive, and the major concern for managers is to preserve and promote the sustainable competitive advantage. Companies have an obligation to improve their product quality and have extensive and close cooperation with other companies involved in the supply chain of products. Sup...

Information Technology MCDM FAHP GTMA Selecting the right technology is always a difficult task for decision-makers. Technologies have varied strengths and weaknesses which require careful assessment by the purchasers. The purpose of this paper is applying an integrated method to Information technology selection. Proposed approach is based on Fuzzy...

It believes that firms must extract maximum value from the knowledge they possess, acquire or create in order to compete and survive. In other hand, developing close relationship between suppliers and customers are well encouraged in the literature because relationships in supply chain have shown inspiring changes. Considering dimensions of Knowled...

In today's competitive market, manufacturers not only intend to improve internal conditions, but choosing the best of markets and suppliers is at the top of their agenda. Selecting the best alternatives in each of these decisions requires analysis of many factors, which as a result, encounters organizations with a problem of multi-criteria decision...

Carbon dioxide enhanced oil recovery (EOR) has the potential to allow the continued production from oil fields while reducing CO2 emissions to the atmosphere. In order to initially evaluate the suitability of a large number of candidate reservoirs, a quick assessment procedure is needed. To the best of the authors’ knowledge such procedure in which...

In recent decades, the rate of new product development increased due to the burst of competition between organizations in developing new products, services and new markets. In such a competitive condition, the main challenge of organizations is to develop new products according to the goals of the organization and needs of customers. Therefore, thi...

Outsourcing plays an important role in the success of organizations. One of the risks associated with outsourcing is inappropriate contractor selection which significantly influences the implementation of projects in terms of time, quality, and cost. In this study, we applied multi-criteria decision-making techniques in order to determine the best...

Supply chain (SC) management aims to increase the overall profit through improvement of various activities and components. Many contradictions between parts and different levels of a SC have been identified in order to achieve overall objectives. Such shortfalls may result in decreased strength and competitiveness of the SC. The basics of game theo...

Regarding the extended concept of coordination generally or specially in supply chain contexts, we aimed to identify the coordination phenomenon in this research by determination of its elements and dimensions. The results of the previous researches, were analyzed by the Metha-synthesis research method and when seven steps were passed, the supply c...

The performance of organizational projects has an eminent role in successfully implementing strategies. This is especially important in project-based organizations whose business is projects. Parent organization as one of the groups that determines projects’ success and failure has various functions regarding its projects. Identifying these functio...

This research aims to investigate the factors that drive suppliers to implement sustainable practices in the supply chain of Iranian Gas Engineering and Development Company (IGEDC) in Iran. This study reviews the sustainability literature and sustainable supply chain (SSC) and the role of suppliers in a SSC. Literature review identified the main ca...

In this paper, the evaluation of customers'satisfaction is investigated by using group decision making method under uncertainty. Here, we have used the Zadeh's fuzzy concept to model and measure the satisfaction. For this purpose, we have firstly applied the Delphi method with fuzzy Likert scales. Then, the fuzzy ELECTRE technique was used in order...

The adoption of information technology (IT) along with supply chain management (SCM) has become increasingly a necessity among most businesses. This enhances supply chain (SC) performance and helps companies achieve the organizational competitiveness. IT systems capture and analyze information and enable management to make decisions by considering...

In the resource-based theory, the balance between knowledge and other resources is for the benefit of the changed knowledge, so that knowledge has become a determinant factor, even more than land, work and capital. But the development of the organizational knowledge is rooted in organizational learning that appears at all of organizational levels a...

Organizations around the world are looking for new approaches to maintain or develop competitive advantage. Outsourcing can be such an approach and one of the strategies that can lead to greater competitiveness. Maintaining and developing core competences as a way of providing barriers to protect against present and future competitors; make full us...

The purpose of this study is to design a mechanism for evaluating business activities with focus on the inventory system through supply chain approach and to implement it in the energy industry. It is necessary to identify the main business purposes through supply chain approach for achieving purpose of the study. In order to design the rational me...

It seems that to recognize and classify the factors affecting organizational agility and need to specify the amount of their importance for the organization is essential to preserve survival and success in today's environment. This paper reviews the concept of agility and its division in the following indicators included the factors of motivations...

Today entrepreneurship is considered as the economic driving engine for developed and developing countries and most countries have invested considerably on entrepreneurship development. The entrepreneurship development in a community could provide sustainable employment and economic development. It should be noted that entrepreneurship development...

Paradigms are some principles and assumptions, which define frameworks and research priorities in each discipline. Many believe that operational research (OR) is not a science and like many other sciences does not have any paradigm. However, since OR is committed to scientific methods, therefore it contains a methodological paradigm. The purpose of...

The purpose of this study is to design and implement the measurement and improvement system for maintenance that leads to improve and promote the maintenance conditions purposely in terms of organizational goals and strategies. In order to this, a model has been developed for realizing the research purpose based on the literature review and then th...

Transferring knowledge and technology from university to industry by New- Technology-Based Firms (NTBFs) is a strategy that has been implemented in Iran in the recent decades (or the last decade). However, it seems that this strategy has failed to lead to a significant change in the domestic industry. In this paper, we attempt to analyze academic N...

Purpose of this paper is to create a model for designing a new model in order to convey the voice of employees and customers to organization's processes. Historical study and field study methods are used to collect data and questionnaire is tool of data collection. Descriptive and inferential statistics methods, ranking and matrix analysis method i...

چكيده امروزه تضمین توسعه پایدار هر کشور منوط به حفظ و استفاده بهینه از منابع محدود و قابل جایگزین در آن کشور شده است، و اقدامات گوناگونی برای مواجهه با این مسئله توسط دولت ها انجام گرفته است که از جمله آنها اعمال قوانین و اصول سبز است. هدف اصلی این پژوهش شناسایی، و طبقه بندی ابعاد «مدیریت زنجیره تأمین سبز» در صنعت بازیافت کاغذ و مقوا، فلزات و پلاس...

Selecting a proper system of Enterprise Resource Planning (ERP) is currently a major challenge for enterprise managers. Heavy expenses of incorrect decisions in selection of the ERP system have made academics and managers consider this phase as highly important. Thus, several researches and studies have proposed different approaches to selecting th...

A breeding hexaploid wheat line named later WS-85-10 was introduced to Iran within the CIMMYT 24th-ESWYT international nursery with "PRL/2*Pastor" pedigree in 2003. This line showed grain yield of 8.116 t/ha compared to check cultivar Pishtaz with 7.671 t/ha in Karaj during 2003-2004 crop season. It also showed grain yields of 7.083 and 8.066 t/ha...

Purpose: The aim of this study is applying a new method for Industrial robotic system selection. Design/methodology/approach: In this paper, the weights of each criterion are calculated using fuzzy Shannon's Entropy. After that, fuzzy TOPSIS is utilized to rank the alternatives. After that we compare the result of Fuzzy TOPSIS with Fuzzy VIKOR meth...

Today more than ever, organizations have realized a strong partner for innovation called customer. In fact, the increasing change in demands of customers and higher competitiveness of the market has made the organizations search for the sources of gaining competitive advantage not in themselves but rather in consumers. Customer knowledge is what th...

Location selection is a multi-criteria decision problem and has a strategic importance for many companies. In this study, an integrated approach which employs Fuzzy AHP and Fuzzy GTMA is proposed for location selection of Gas pressure reducing stations. The Fuzzy AHP is usedto analyze the structure of location selection problem and to determine wei...

The concept of competitiveness has attracted abundant attentions of both scholars and governors during the past decade. During this period, the world economic forum has published its annual reports which encompass Global Competitiveness Index (GCI) in order to measure national competitiveness in different countries. This paper aims at investigating...

Nowadays, the problem of supplier selection has emerged as an active research field where numerous research papers have been published around this area within last few years. Supplier selection plays a key role in supply chain management (SCM) and deals with evaluation, ranking and selection of the best option from a pool of potential suppliers esp...

This paper examines the determinants of foreign direct investment (FDI) in Iran by applying the structural equation modelling (SEM). Using the annual time series data for the 1991-2006 period, two models were developed. In the first model the correlation between 12 determining factors and FDI in Iran were analyzed and in the second model the 12 fac...

The technology is the factor of wealth creation. The more effective use of technology severely affects the competition conditions. The concept of competitiveness has attracted abundant attentions of both scholars and governors during the past decade. During this period, the World Economic Forum has published its annual reports which encompass Globa...

برنامه‌ریزی نگهداری و تعمیرات شاخه‌ای از رشته مدیریت صنعتی و مهندسی صنایع است که با کنترل تجهیزات و ماشین آلات تولیدی از نظر برنامه زمانبندی تعمیراتی و تعویض قطعات و با استفاده از تجزیه و تحلیل¬های آماری هزینه‌های تعمیراتی را کاهش می‌دهد و در سطح بهینه نگه می‌دارد. مانند تمام مفاهیم موجود در علم و تکنولوژی درگاه ورودی به این حوزه نیز با تعریف نگهدا...

Nowadays, Due to the accelerated environment changes and organizational decisions have become complex, the need for using strategic programs to face this kind of problems is more tangible. In this paper, at first, the most influential internal and external elements were detected with the help of the techniques of strategy formulation. Then having u...

Abstract: This research has been done for design and explanation of a model toward attaining to agility at manufacturing organizations and impact of agility on competitive advantage and organizational performance. For achieving this purpose, at first, latent variables include agility, competitive advantage, and organizational performance is tested...

Abstract Tavanir Company uses EFQM excellence model for periodic assessment of regional electric companies with which it can assure the improvement of their activities and performances. This firm requires appropriate tools for strategic use of EFQM results. There are many arguments on simultaneous use of EFQM excellence model and Balanced Score Car...

Construction industry is an important part of any economy. But it does not have an appropriate performance especially in the productivity of materials. Statistics show production of billions of tons of construction waste per year in the world, and these issues threaten all beneficiaries of this industry. Thus, convenient strategies should be founde...

In today’s perpetually changing environment, supply chain agility is a critical element affecting organization`s competitiveness. In order to turn supply chain into an agile supply chain, we need to first clarify the meaning of supply chain agility. Because agility is a very broad and multi-dimensional concept, it involves diverse aspects of an org...

This paper examines the determinants of foreign direct investment (FDI) in Iran by applying the structural equation modelling (SEM). Using the annual time series data for the 1991-2006 period, two models were developed. In the first model the correlation between 12 determining factors and FDI in Iran were analyzed and in the second model the 12 fac...

Some quandaries in marketing and proffering after-sale services to the customers in the global marts have brought about oodles of predicaments for the Iranian hand-woven carpet industry practitioners. Although Iranian carpet is an original product, we have witnessed a downfall in the Iranian hand-woven carpet industrial manufacturing and export dur...

Agility is a set of capabilities and competencies that an organization should be have until can be thrive and prosper in a continuously changing, unpredictable business environment. At first, in this paper is presented a model for achieving organizational agility and then suggests a knowledge-based methodology for measuring agility. Therefore every...

Agility is a set of capabilities and competencies that an organization should be have until can be thrive and prosper in a continuously changing, unpredictable business environment. At first, in this paper is presented a model for achieving organizational agility and then suggests a knowledge-based methodology for measuring agility. Therefore every...

Evaluation and selection of research projects are two important activities in decision making process of research and expertise panels and councils. They involved in participating a group of experts and decision-makers to evaluate the research projects with considering a set of criteria, then selecting a set of projects which better meet an organiz...