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Configuration design of scalable reconfigurable manufacturing systems for part family
, Article International Journal of Production Research ; 2019 ; 00207543 (ISSN) ; Houshmand, M ; Saitou, K ; Fatahi Valilai, O ; Sharif University of Technology
Taylor and Francis Ltd
2019
Abstract
Intense global competition, dynamic product variations, and rapid technological developments force manufacturing systems to adapt and respond quickly to various changes in the market. Such responsiveness could be achieved through new paradigms such as Reconfigurable manufacturing systems (RMS). In this paper, the problem of configuration design for a scalable reconfigurable RMS that produces different products of a part family is addressed. In order to handle demand fluctuations of products throughout their lifecycles with minimum cost, RMS configurations must change as well. Two different approaches are developed for addressing the system configuration design in different periods. Both...
Configuration design of scalable reconfigurable manufacturing systems for part family
, Article International Journal of Production Research ; 2019 ; 00207543 (ISSN) ; Houshmand, M ; Saitou, K ; Fatahi Valilai, O ; Sharif University of Technology
Taylor and Francis Ltd
2019
Abstract
Intense global competition, dynamic product variations, and rapid technological developments force manufacturing systems to adapt and respond quickly to various changes in the market. Such responsiveness could be achieved through new paradigms such as Reconfigurable manufacturing systems (RMS). In this paper, the problem of configuration design for a scalable reconfigurable RMS that produces different products of a part family is addressed. In order to handle demand fluctuations of products throughout their lifecycles with minimum cost, RMS configurations must change as well. Two different approaches are developed for addressing the system configuration design in different periods. Both...
Configuration design of scalable reconfigurable manufacturing systems for part family
, Article International Journal of Production Research ; Volume 58, Issue 10 , 2020 , Pages 2974-2996 ; Houshmand, M ; Saitou, K ; Fatahi Valilai, O ; Sharif University of Technology
Taylor and Francis Ltd
2020
Abstract
Intense global competition, dynamic product variations, and rapid technological developments force manufacturing systems to adapt and respond quickly to various changes in the market. Such responsiveness could be achieved through new paradigms such as Reconfigurable manufacturing systems (RMS). In this paper, the problem of configuration design for a scalable reconfigurable RMS that produces different products of a part family is addressed. In order to handle demand fluctuations of products throughout their lifecycles with minimum cost, RMS configurations must change as well. Two different approaches are developed for addressing the system configuration design in different periods. Both...
A matching mechanism for public cloud manufacturing platforms using intuitionistic Fuzzy VIKOR and deferred acceptance algorithm
, Article International Journal of Management Science and Engineering Management ; Volume 16, Issue 2 , 2021 , Pages 107-122 ; 17509653 (ISSN) ; Fatahi Valilai, O ; Houshamand, M ; Ashtiani, F ; Sharif University of Technology
Taylor and Francis Ltd
2021
Abstract
Online manufacturing platforms are spreading in the manufacturing industry in the shade of Cloud Manufacturing systems. The paper manipulates a matching mechanism for public Cloud Manufacturing platforms based on the Intuitionistic Fuzzy Sets Theory, VIKOR method, and Deferred Acceptance algorithm. The VIKOR method provides a rational, scientific, and systematic approach to enable providers and consumers to evaluate the attributes of each other and develop their preference lists. The method is augmented by the Intuitionistic Fuzzy Sets Theory to grasp the high level of vagueness and uncertainty in the process of preference list development. The utilization of Deferred Acceptance algorithm...
An autonomous framework for interpretation of 3D objects geometric data using 2D images for application in additive manufacturing
, Article PeerJ Computer Science ; Volume 7 , 2021 , Pages 1-32 ; 23765992 (ISSN) ; Houshmand, M ; Valilai, O. F ; Sharif University of Technology
PeerJ Inc
2021
Abstract
Additive manufacturing, artificial intelligence and cloud manufacturing are three pillars of the emerging digitized industrial revolution, considered in industry 4.0. The literature shows that in industry 4.0, intelligent cloud based additive manufacturing plays a crucial role. Considering this, few studies have accomplished an integration of the intelligent additive manufacturing and the service oriented manufacturing paradigms. This is due to the lack of prerequisite frameworks to enable this integration. These frameworks should create an autonomous platform for cloud based service composition for additive manufacturing based on customer demands. One of the most important requirements of...
A robust optimization approach for a cellular manufacturing system considering skill-leveled operators and multi-functional machines
, Article Applied Mathematical Modelling ; Volume 107 , 2022 , Pages 379-397 ; 0307904X (ISSN) ; Kayvanfar, V ; Mohammadi, A ; Werner, F ; Sharif University of Technology
Elsevier Inc
2022
Abstract
One of the most critical issues in manufacturing systems is the operator management. In this paper, the operator assignment problem is studied within a cellular manufacturing system. The most important novelty of this research is the consideration of operator learning and forgetting effects simultaneously. The skill level of an operator can be increased/decreased based on the time spent on a machine. Moreover, the issues related to operators like hiring, firing, and salaries are considered in the proposed model. The parameters are considered to be uncertain in this model, and a robust optimization approach is developed to handle it. Using this approach, the model solution remains feasible...
A multi-objective optimization model for dynamic virtual cellular manufacturing systems
, Article International Journal of Industrial Engineering and Production Research ; Volume 33, Issue 2 , 2022 ; 20084889 (ISSN) ; Mahdavi, I ; Mahdavi Amiri, N ; Paydar, M. M ; Sharif University of Technology
Iran University of Science and Technology
2022
Abstract
Companies and firms, nowadays, due to mounting competition and product diversity, seek to apply virtual cellular manufacturing systems to reduce production costs and improve quality of the products. In addition, as a result of rapid advancement of technology and the reduction of product life cycle, production systems have turned towards dynamic production environments. Dynamic cellular manufacturing environments examine multi-period planning horizon, with changing demands for the periods. A dynamic virtual cellular manufacturing system is a new production approach to help manufacturers for decision making. Here, due to variability of demand rates in different periods, which turns to flow...
Multi-phase matching mechanism for stable and optimal resource allocation in cloud manufacturing platforms Using IF-VIKOR method and deferred acceptance algorithm
, Article International Journal of Management Science and Engineering Management ; Volume 17, Issue 2 , 2022 , Pages 103-111 ; 17509653 (ISSN) ; Houshmand, M ; Ashtiani, F ; Fatahi Valilai, O ; Sharif University of Technology
Taylor and Francis Ltd
2022
Abstract
Public platforms are one of the most important Cloud Manufacturing modes. Public platforms enable an environment for manufacturers and demanders to freely and directly connect with each other. Exploiting the high potentials of public platforms depends on final matching. This paper has developed a multi-phase matching mechanism for stable and optimal resource allocation in public platform. The proposed mechanism grades the demanders using an intuitionistic fuzzy VIKOR method using three measures of quality, time, and sustainability. Then, the mechanism clusters the demanders based on these three measures; and finally, allocates the clusters using the Deferred Acceptance (DA) algorithm to the...
Adaptive capacity management in cloud manufacturing hyper-network platform: Case of COVID-19 equipment production
, Article International Journal of Management Science and Engineering Management ; Volume 17, Issue 4 , 2022 , Pages 239-258 ; 17509653 (ISSN) ; Eshghi, K ; Fatahi Valilai, O ; Sharif University of Technology
Taylor and Francis Ltd
2022
Abstract
Cloud Manufacturing (CMfg) is a service-oriented manufacturing (SOM) paradigm that provides a dynamic, scalable, and virtualized working ecosystem. The CMfg collaborative structure can be modeled as a hyper-network-based service-demand matching architecture. It is enriched with quality of service (QoS) characteristics to produce customized products in a stable and reliable network. This stability should be considered in the overall manufacturing network mechanism. This paper has provided adaptive strategies utilizing available resources and capacities to enhance the system’s stability and reliability against the unexpected events. The capabilities of the enhanced framework are utilized to...
Robust facility layout design for flexible manufacturing: a doe-based heuristic
, Article International Journal of Production Research ; Volume 60, Issue 18 , 2022 , Pages 5633-5654 ; 00207543 (ISSN) ; Salimpour, S ; Akhavan Niaki, S. T ; Azab, A ; Sharif University of Technology
Taylor and Francis Ltd
2022
Abstract
Flexible manufacturing systems (FMS) should be able to respond to changing manufacturing requirements and environments. From the layout point of view, FMS need to be rearranged to fit the new requirements. However, rearranging the layout is often undesirable due to its unpredicted high costs and production disruption. This paper proposes a practical approach to mitigate the effects and repercussions of changing environments and avoid rearranging the layout. A robust layout approach is presented, where changes in product demand and mix are absorbed by altering product routes and not rearranging the layout. In this approach, the problem is decomposed into two sub-problems: sub-problem 1 (SP1)...
Production planning of reconfigurable manufacturing systems with stochastic demands using Tabu search
, Article International Journal of Manufacturing Technology and Management ; Volume 17, Issue 1-2 , 2009 , Pages 125-148 ; 13682148 (ISSN) ; Houshmand, M ; Sharif University of Technology
2009
Abstract
In the new competitive dynamic market, manufacturing success and survival are becoming more and more difficult to ensure. In other words, getting the right product with low cost and high quality is not the only key to success. New requirements such as production responsiveness and flexibility should be considered. Reconfigurable Manufacturing System. (RMS) is a new paradigm that enables manufacturing systems to achieve rapid response to market demand. The effectiveness of an RMS depends on implementing key characteristics and capabilities of RMS in system design stage and benefiting from them in utilisation stage. In this paper, we introduced a methodology to adjust rapidly and productively...
A Novel Framework to Enable Optimum Feature based Process Planning based on STEP-NC Standard and CNC Machines
, M.Sc. Thesis Sharif University of Technology ; Houshmand, Mahmoud (Supervisor)
Abstract
In the domain of manufacturing, computer numerically controllers (CNC) technology is a major contributor to the production capacity of the enterprises. The advances in CNC technology coupled with enhancements in computing systems have provided the basis to re-examine the way in which computer-aided systems (CAx) can be used to enable global manufacturing. Interoperability of the various components of the CAx chain is therefore a major prerequisite for manufacturing enterprises for becoming strategically agile and consequently globally competitive. Being interoperable, resources can be utilized interchangeably in a plug-and-produce manner. Over the last 8years the eminence of a STEP...
Analysis and Evaluation of Computer Integrated Manufacturing: IRCA Company
, M.Sc. Thesis Sharif University of Technology ; Mostafavi, Mostafa (Supervisor)
Abstract
Today in many industrial sectors, technology has made significant progress. Investing in advanced manufacturing technologies, especially computer integrated manufacturing systems is essential in order to survive in a competitive environment, improve performance, response to demand fluctuations and increase customer satisfaction. With available technologies and systems in computer integrated manufacturing (CIM) and its related technologies, the application of CIM in manufacturing enterprises is a reality and can meet the need of complicated manufacturing environment. Implementation of these systems brings many tangible and intangible benefits. But, according to several factors that must be...
Configuration Design in Scalable Reconfigarable Manufacturing Systems (RMS)
, Ph.D. Dissertation Sharif University of Technology ; Houshmand, Mahmoud (Supervisor) ; Fatahi Valilai, Omid (Supervisor)
Abstract
The dynamic nature of today’s manufacturing industry, which is caused by the intense global competition and constant technological advancements, requires systems that are easily adaptable with new functions and technologies. In fact, a highly responsive manufacturing system is needed in which, introducing new products, adjusting system capacity with demand fluctuations and integrating new technologies with the existing ones are quickly possible. Reconfigurable Manufacturing systems (RMS) are a relatively new paradigm in industry that enable rapid adjustments of production capacity to changes in product mix and volume through their main characteristics including modularity, scalability and...
Cloud Computing Related to the Optimization of Compilation of Services from the Point of View of Cloud Computing Customers with A Multi-Objective Function in The Country's Office Equipment Manufacturing Industry
, M.Sc. Thesis Sharif University of Technology ; Houshmand, Mahmoud (Supervisor)
Abstract
Today, in order to keep up the competition in the market, companies need to use the latest technologies, methods, processes, applications, etc. to find the best services and products. For this, companies and organizations need more dynamism to make the best decisions that can accelerate business process changes. Cloud computing, which is one of the newest and most important business models, can contribute to their success by sharing information and production resources between organizations, as well as helping them compete globally with each other's capabilities. In this research, a multi-objective model is proposed to optimize customer decision-making in using cloud computing and the...
Integrated Design of Cellular Manufacturing Systems
, M.Sc. Thesis Sharif University of Technology ; Houshmand, Mahmoud (Supervisor)
Abstract
Increasing competition in global market and different requirements of customers persuade manufacturers to improve the efficiency of their manufacturing activities. For this end cellular manufacturing systems can be introduced as an innovative and compromising practice for companies. Among the necessary decisions for a successful cellular manufacturing design and implementation, production routing selection (PRS), cell formation (CF), group layout (GL) and group scheduling (GS) are the four most important ones. This research investigates these decisions and proposes a new approach to integrate them. We use important production factors such as production volume, operation sequence, operational...
Configuration Design in Scalable Reconfigarable Manufacturing Systems (RMS)
, M.Sc. Thesis Sharif University of Technology ; Houshmand, Mahmoud (Supervisor)
Abstract
The dynamic nature of today’s manufacturing industry, which is caused by the intense global competition and constant technological advancements, requires systems that are easily adaptable with new functions and technologies. In fact, a highly responsive manufacturing system is needed in which, introducing new products, adjusting system capacity with demand fluctuations and integrating new technologies with the existing ones are quickly possible.Reconfigurable Manufacturing systems (RMS) are a relatively new paradigm in industry that enable rapid adjustments of production capacity to changes in product mix and volume through their main characteristics including modularity, scalability and...
Topology optimization for manufacturability of Additive Manufacturing based on Deep Learning and Generative Adversarial Network
, M.Sc. Thesis Sharif University of Technology ; Khodaygan, Saeed (Supervisor)
Abstract
In recent years, Additive Manufacturing has been extensively used by various industries. These manufacturing processes produce components in a layer-by-layer manner; therefore, they do not impose any geometric constrains to engineers and provide designers with the freedom to design components. Nowadays, one of the primary goals of all industries is to utilize as few raw materials as possible; this way they can deal with the shortage of raw materials and improve their efficiency. Consequently, they implement topology optimization algorithms to design and produce their components. However, topology optimization algorithms result in complicated geometries that can only be fabricated by AM....
Manufacturing error compensation based on cutting tool location correction in machining processes
, Article International Journal of Computer Integrated Manufacturing ; Vol. 27, Issue. 11 , 29 Oct , 2014 , pp. 969-978 ; ISSN: 0951192X ; Sharif University of Technology
Abstract
Inaccuracies in workpiece location lead to errors in position and orientation of machined features on the workpiece, and strongly affect the assemblability and the quality of the product. The accurate positioning of workpiece on a fixture is influenced by rigid body displacements and rotations of the workpiece due to several errors (e.g. geometric radial and position errors in locators and manufacturing tolerances of the workpiece). In this paper, an efficient approach is introduced for analysis and compensation errors in the workpiece-fixture-cutting tool system. A new mathematical formulation of workpiece-fixture modelling is proposed to establish the relationship between the locating...
A layered and modular platform to enable distributed CAx collaboration and support product data integration based on STEP standard
, Article International Journal of Computer Integrated Manufacturing ; Volume 26, Issue 8 , 2013 , Pages 731-750 ; 0951192X (ISSN) ; Valilai, O. F ; Sharif University of Technology
2013
Abstract
Exploitation of distributed resources spread in diverse enterprises is a new and critical issue in the course of product development cycles. Although the development of IT technology has provided a base for realisation of this paradigm and assisted different CAx agents, such as designers and engineers, to exchange their ideas and design information, but still many CAx software agents are working separately and locally in manufacturing environments and most of the current CAx software suites have been known to be inconvenient for enabling collaboration among manufacturing agents in distributed manufacturing enterprises. The distributed CAx collaboration and data integrity play a major role in...