Hamed Fazlollahtabar

Hamed Fazlollahtabar
Damghan University | DU · School of Engineering

PhD of Industrial and Systems Engineering

About

250
Publications
65,374
Reads
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1,917
Citations
Citations since 2016
111 Research Items
1567 Citations
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2016201720182019202020212022050100150200250300350
2016201720182019202020212022050100150200250300350
2016201720182019202020212022050100150200250300350
Additional affiliations
October 2015 - present
Sharif University of Technology
Position
  • PostDoc Position
August 2013 - March 2015
Maziar Sanat Company
Position
  • Supreme Counselor
September 2011 - present

Publications

Publications (250)
Article
Full-text available
Logistics networks are significant for successful implementation of supply chain networks. Different configurations of logistics network exist regarding application areas and industrial requirements. One important consideration currently attracted the attention of researchers is sustainability focusing on economic, social and environmental factors....
Article
In this paper, we discuss about the hierarchical Bayesian (HB) estimation concerning system reliability for a waste‐to‐energy (WTE) process. The main goal of this approach is to obtain this estimation WTE process reliability under different loss functions related series, parallel, and k‐out‐of‐m systems. In this case, we can drive system outcome by...
Article
Information Systems (IS) have turned into vital means for companies to survive in the contemporary technology-oriented environment. Subsequently, over the last decades, this has brought about the heavy investment of companies in ISs to guarantee high-quality products and services. Similarly, supplier selection (SS) plays an inescapable role in toda...
Article
Full-text available
An electrical discharge machine (EDM) has a high impact on production management, with its process having many advantages over conventional machining processes, including the ability of the machine to create very high-quality material that is intricate to inner industrial sections. This study investigates the impact of EDM machining parameters on t...
Article
Full-text available
Recent supply and innovation literature emphasizes the importance of foreign participation in product development. Based on this work flow, this study distinguishes four novel interagency new product development strategies (NPDs) based on two dimensions: the external source “supply chain supplies [SCS] and non-supply chain resources (NSCS)” and the...
Article
This paper models a sustainable reverse logistics process for polystyrene disposable appliances as an MINLP, with uncertain demand and cost of recovery of the used products. Three heuristics, cross-entropy, genetic algorithm and simulated annealing, are used to generate the initial solution for the MINLP model. Next, robust optimization is applied...
Article
Industrial companies would attempt to keep themselves agile in the dynamic market. Given the competition among industries, lean methods are employed to reduce costs in the system. Among them, maintenance is significant to have a system available for manufacturing tasks. Maintenance is identified as the largest cost control tools in the equipment-dr...
Article
Information Systems (IS) have become crucial for all the organizations to survive in contemporary technology-oriented environment. Consequently, the number of companies and organizations which have invested widely in their IS infrastructures to present better services and to produce higher value products is increasing. On the other hand, nowadays,...
Article
Full-text available
Nowadays, an efficient and robust plan for maintenance activities can reduce the total cost significantly in the equipment-driven industry. Maintenance activities are directly associated with the impact on the plant output, production quality, production cost, safety, and the environmental performance. To address this challenge more broadly, this p...
Article
Purpose The purpose of this paper is to present an integrated strategy for inventory control and preventive maintenance planning for a single-machine production system with increasing failure rates. Design/methodology/approach There are three scenarios for solving presented model. The strategy is such that the production component is placed under...
Article
This paper concerns with the integration of rough set theory with the Best Worst method to evaluate information system performance within supplier selection problem of biofuel companies. First, a set of main criteria and sub-criteria are collected and then to include uncertainty in decision making, rough set theory is employed. The rough best worst...
Article
Full-text available
Purpose The purpose of this study is to investigate the benefits of the turning point layout; a simulation model being applicable for strategic level is designed that compares systems with and without turning points. Specifically, the avoidance of deadlocks and prevention of conflicts is substantial. Design/methodology/approach Optimization proces...
Article
Industry 4.0 integrated with robotic and digital fabrication technologies have attracted the attention of manufacturing researchers. Autonomous assembly with supervisory control and data acquisition (SCADA) systems holds the promise of greater scalability, adaptability, and potentially evolved design possibilities helping to maintain efficiency, pr...
Article
Today's competitive environment requires a higher level of quality in processes, services, and products to reach a larger portion of market share and economic success. Quality management being a systematic approach for quality-related evaluation and development is substantial for companies. Industry 4.0 is defined as the integration of physical mac...
Article
Purpose However, due to the huge number of studies and on the other hand to be new and creative, the represented models and methods – as the two main parts of this field – have been got more complicated, which consequently have been turned into unpractical research studies for the realistic situations. Therefore, the purpose of this study is the re...
Article
Nowadays, Industries have been receiving much attention in Failure modelling and reliability assessment of repairable systems due to the fact that it plays a crucial role in risk and safety management of process. The primary purpose of this article is to present a methodology for discussing uncertainty in the reliability assessment if the productio...
Article
Full-text available
The purpose of this paper is to propose a model for assessing the hazard system based on the failure structure of aircraft wing. The model considers reliability maintenance and repair factors. Failure Mode and Effect Analysis (FMEA) is one of the well-known methods of quality management being used for continuous improvement in product or process pl...
Article
In this study, we analyze the proficiency of a single-server Markovian queuing system M/M/1/N with unpleasant services and encouraged arrivals to compare the policies for service delivery, which is a context of social planning to improve the social welfare. Then, we examine the economic analysis of the cost in an uncertain environment. In this rega...
Article
Full-text available
Effective transportation methods in automated manufacturing systems increase efficiency and decrease final product cost. Flexibility of autonomous guided vehicles (AGVs) in performing transportation tasks makes them an important option in automated manufacturing system design. Optimal decisions for configuring tandem AGV system in a real-time mecha...
Article
Today, due to the increasing environmental hazards and governmental regulations, as well as the limitation of sources of production, researchers have paid special attention to the design of closed-loop green supply chain networks. The closed-loop supply chain networks (CLSCN) include the returns processes and the producers aim to capturing addition...
Article
Full-text available
This paper takes random machines breakdowns and the two-stage assembly flow shop problem into consideration as a realistic assumption in industrial environments. In practical manufacturing environment, disruptions and unforeseen incidents occur, so a schedule being built based on deterministic information is not practical and may lead to poor perfo...
Article
The aim of this paper is to develop a DEA-based framework to evaluate the efficiency of supply chain based on the seller-buyer structure and with respect to win-win strategy. This is a bi-stage model employing the CCR model in the forms of input-oriented and output-oriented considering the intermediate measures for two different conditions under a...
Article
Full-text available
This paper concerns with an integrated business process to be applied as a decision support for market analysis and decision making. The proposed business intelligence and analytics system makes use of an extract, transform and load mechanism for data collection and purification. As a mathematical decision optimization, dynamic pricing is formulate...
Article
Today, in many organizations, the debate about the difference in core capabilities has become an important factor for market competition. Companies, based on the field of activity, decide to strengthen some of their capabilities, capacities, and expertise. Therefore, the focus of an organization on the strengths and efforts to develop its sustainab...
Article
This paper suggests a DEA-based structure for efficiency evaluation of supply chain innovations considering innovation risk and performance improvement. In this model, risk paradigms of supply chain innovation and popular supply chain performance measures are considered as the input and output of CCR- output oriented model respectively. Defect of D...
Article
Reverse supply chain is a process dealing with the backward flows of used/damaged products or materials. Reverse supply chain includes activities such as collection, inspection, reprocess, disposal and redistribution. A well-organized reverse supply chain can provide important advantages such as economic and environmental ones. In this study, we pr...
Article
An electrical discharge machining (EDM) is one of the special production methods that are widely used in moldings, repairs and production of specific industrial components. Due to extensive production costs, optimal machining specifications are significant. Machining specifications are effective on output quality and thus attract more customers lea...
Article
Full-text available
This paper deals with hybrid flow shop scheduling problem with unrelated and eligible machines along with fuzzy processing times and fuzzy due dates. The objective is to minimize a linear combination of total completion time and maximum lateness of jobs. A mixed integer mathematical model is presented for the problem. The most challenging parts of...
Article
Purpose In real manufacturing systems, schedules are often disrupted with uncertainty factors such as random machine breakdown, random process time, random job arrivals or job cancellations. This paper aims to investigate robust scheduling for a two-stage assembly flow shop scheduling with random machine breakdowns and considers two objectives make...
Article
Full-text available
Technology selection and technology transfer are widely used in developing countries. Technology as a science of application of knowledge is simple or complex, personal or public, new or old. Technology transfer is a way to transmit skills, knowledge, production method, production samples and facilities among societies, universities and other commu...
Article
This paper concerns with comparing simulation studies for a newly developed concept of turning point to be used in multiple robot path planning. Different critical factors and design parameters are collected and statistical analyses are performed. After configuring different simulation scenarios, the efficient one is evaluated using a robust data e...
Article
Full-text available
Considering the importance of the quality and responsiveness of manufacturing companies to customers, the most important principle can be considered to be the reduction of the cycle time of the production process. Because in the real world due to measurement errors and inaccuracies of information and the uncertainty of processes the concept Fuzzy i...
Article
Full-text available
Purpose This paper presents a stepwise method for identification and analysis of innovative activities in production systems. The purpose of this paper is to provide a structure in order to propose the risk paradigms and factors corresponding to the innovative activities and evaluation of the impact of these activities on innovation decisions and i...
Article
Full-text available
Objective Path planning for production robots has been investigated. The sequence of the orders to be processed in a certain planning horizon has been planned for the production system. Methods Production automatic robots are employed to carry parts and products among all production stations and machining centers. The combination of machines in st...
Article
Modern manufacturing systems should comply with high reliability and availability standards in order to guarantee efficient planning and optimization. Manufacturing systems including autonomous robots make the problem more challenging. By increasing the number of components in the autonomous manufacturing system and with respect to their intermitte...
Article
Full-text available
A warehouse system as a time transformation of the flows of goods plays an essential role in a complete logistics chain. The efficiency of a complete warehouse system largely depends on the efficiency of carrying out transport and handling operations. Therefore, it is essential to have adequate means of internal transport that will influence the ef...
Article
Full-text available
In this paper, we carry out queuing analysis to examine and integrate a quality control (inspection) process into a multi-stage flexible ow shop configured in an M=M=1 queue system. Our main concern is to improve the performance of multi-stage exible ow shop production. Besides, this work aims to help managers in improving their effeciency and effe...
Chapter
Assume a production system having multiple robots and work stations leading to a complex system. To evaluate the reliability of this system, a network of components is considered configuring a complex reliability network. A robotic network is considered which has perfect vertices and imperfect links. It means path links may fail with known probabil...
Article
With the growing data available on the Internet, customization of the web sites information has become a requirement for users. A procedure for the appropriate customization of web data is configured by automatic extraction of combined knowledge of the log file and user profile information. In this paper, integrating decision tree and association r...
Article
Since product pricing is a significant decision for producers and is known as a challenging problem in today's marketing operations, the aim of this study is to design an integrated decision support system for pricing. The emerging business environment is highly dynamic in which only companies being higher in terms of competitiveness can succeed in...
Article
Full-text available
Prediction of surface roughness is a key element for an automated machining center. In this regard, it is important to optimize the machining process. In this paper, fuzzy linear regression approach is employed to predict the surface roughness for a turning process in an uncertain condition. The important process parameters such as cutting speed, c...
Article
Full-text available
Current design practice is usually to produce a safety system which meets a target level of performance that is deemed acceptable by the regulators. Safety systems are designed to prevent or alleviate the consequences of potentially hazardous events. In many modern industries the failure of such systems can lead to whole system breakdown. In reliab...
Article
This paper proposes a framework for classification of innovative activities in production systems based on corresponding calculated risk intensity using decision tree method. A three-step process is developed. The basis of the framework is the innovative activities collected from the literature. These activities are collected from the related liter...
Article
Full-text available
Ensuring costs reduction and increasing competitiveness and satisfaction of end users are the goals of each participant in the supply chain. Taking into account these goals, the paper proposes methodology for defining the most important criteria for suppliers’ evaluation. From a set of twenty established criteria, i.e. four sets of criteria: financ...
Article
Full-text available
In this paper, the minimal paths-and-cuts technique is developed to handle fault tree analysis (FTA) on the critical components of industrial robots. This analysis is integrated with the reliability block diagram (RBD) approach in order to investigate the robot system reliability. The model is implemented in a complex advanced manufacturing system...
Article
Purpose Due to the fact that the non-standard products, being used by customers, may cause failures in products with sales delays, which naturally affect the warranty policy. Thus, it seems to be necessary to study these two concepts simultaneously. The paper aims to discuss these issues. Design/methodology/approach In this paper, a model is devel...
Article
This study considers customer demands and production capacity to investigate sale process. The aim is to find selling gap being the difference between sold products and the capacity of selling capability of the production system. Customers' opinions over various attributes of products reflect defects and drawbacks of the production and service. Her...
Article
Full-text available
In this paper, simultaneous scheduling and routing problem for autonomous guided vehicles (AGVs) is investigated. At the beginning of the planning horizon list of orders is processed in the manufacturing system. The produced or semi-produced products are carried among stations using AGVs according to the process plan and the earliest delivery time...
Article
Purpose In this paper, a renewal model is employed to estimate the required number of robots consisting of some non-repairable components. Design/methodology/approach Considering the importance of the availability of standby autonomous robots for reducing and preventing down-times of advanced production systems, which imposes a considerable loss...
Book
Supply Chain Management (SCM) is a wide field in which several specialties are included. In general, operations and production management players use SCM to organize the problems and analyze the solution approaches. Due to these points, a reference which can encompass a range of problems and their modelling approaches is required. This book will co...
Article
Nowadays, due to increase of environmental hazards and legislation in this context by governments and also restriction of manufacturing resources, researchers paid special attention to the design of closed-loop green supply chain network. To establish better coordination between the components of the supply chain and gain more profits in the networ...
Article
This paper proposed a parallel automated assembly line system to produce multiple products having multiple autonomous guided vehicles (AGVs). Several assembly lines are configured to produce multiple products in which the technologies of machines are shared among the assembly lines when required. The transportation between the stations in an assemb...
Article
Full-text available
Availability of a system is a crucial factor for planning and optimization. The concept is more challenging for modern systems such as robots and autonomous systems consisting of a complex configuration of components. In this paper, a reliability evaluation framework is developed for a system of binary state autonomous robots in an automated manufa...
Article
Nowadays, in all countries, governments are supposed to have various economic tasks to perform; they are expected to incur heavy expenses to administer the required activities. In order to finance these expenditures, governments have to employ various ways for gaining revenues. One of the government's solutions to finance their expenditures is from...
Book
In today’s competitive world, customer demands for highly reliable products, makes reliability engineering a more challenging task. Reliability analysis is one of the main tools to ensure agreed upon delivery deadlines, which in turn maintains certainty in tangible factors such as goodwill and company reputation. This unique book considers a comple...