Operations Research, Systems Engineering and Industrial Engineering Commons^™

On Convergence Analysis Of Dual Proximal-Gradient Methods With Approximate Gradient For A Class Of Nonsmooth Convex Minimization Problems, Sanming Liu, Zhijie Wang, Chongyang Liu

Chongyang Liu

In this paper, we consider the problem of minimizing a nonsmooth convex objective which is the sum of a proper, nonsmooth, closed, strongly convex extend real-valued function with a proper, nonsmooth, closed, convex extend real-valued function.

An Integrated Gray-Fuzzy Cause And Effect Approach To Determine The Most Significant Categories Of Project Risks, Amin Vafadarnikjoo, Mohammadsadegh Mobin, Christian Salmon, Nikbakhsh Javadian

Mohammadsadegh Mobin

Identifying critical risks in projects has become a core step in project risk management process; however, the nature of this step can be complex and unstructured, suggesting a benefit in research towards prioritizing project risks on the basis of a cogent method. This paper presents a Gray Decision Making Trial and Evaluation Laboratory (GDEMATEL) method for prioritizing sources of project risk within a multi-criteria decision making (MCDM) framework. The framework categorizes sources of risk via the Project Management Institutes’ (PMI) Risk Breakdown Structure (RBS). For this study, project expert judgments and preferences are the source of knowledge about project risk. …

An Integrated Ahp-Gis-Mclp Method To Locate Bank Branches, Sajjad Allahi, Mohammadsadegh Mobin, Amin Vafadarnikjoo, Christian Salmon

Mohammadsadegh Mobin

One of the most crucial decision making processes in banking is optimally locating new branches. This issue is highly important especially for private banks due to vibrant competition, limited budgets and high customer expectations. This study’s objective is to provide an integrated model for selecting optimal site location using available data sources and well accepted decision models, specifically Analytic Hierarchy Process (AHP), Geographic Information System (GIS) and Maximal Covering Location Problem (MCLP).As a case study, we applied the proposed method for branch location of a private bank in the city of Rasht, Iran. The process identified the most commonly used …

Investigating Cavitation Peening Parameters For Fatigue Performance Using Designed Experiment, Mohammadsadegh Mobin, Afshan Roshani, Mahmood Mobin, Ali Rastegari

Mohammadsadegh Mobin

Mechanical surface enhancement techniques such as cavitation peening (CP) have various design parameters which can affect the fatigue performance of the part. In this study, a full factorial design of experiment is applied to investigate the effects of cavitation peening process parameters on the fatigue performance of carburized steel. These parameters include standoff distance, cavitation number, nozzle size, and exposure time. The response variables considered in this experiment include residual stress, surface roughness and austenitic ratio. Results obtained from full factorial design of experiment method were compared with the results from literature which applied Taguchi method. The comparison revealed that …

Aviation Technical Publication Content Management System Selection Using Integrated Fuzzy-Grey Mcdm Method, Ashley Skeete, Mohammadsadegh Mobin

Mohammadsadegh Mobin

The development of commercial maintenance and overhaul manuals for aerospace engines is requisite for certification by the Federal Aviation Administration (FAA). Robust content management systems are used for authoring, publishing, and maintaining these manuals which must meet general industry standards as well as unique company requirements. Therefore, system selection is complex, requiring review of numerous criteria of both quantitative and qualitative nature and is highly dependent on expert judgment which includes uncertainty. In this paper, a major aerospace company was used as a case study for an integrated Fuzzy-Grey Multi-Criteria Decision Making (MCDM) methodology for the selection of a technical …

Performance Evaluation Of Tehran-Qom Highway Emergency Medical Service System Using Hypercube Queuing Model, Mohammadsadegh Mobin, Zhaojun Li, Maghsoud Amiri

Mohammadsadegh Mobin

This paper studies the ambulance deployment of the Tehran-Qom highway emergency medical service (EMS) system. The response time of EMS to an emergency call can have impact on the users in terms of the life and death, and this performance metric is evaluated using the proposed hypercube queuing model. The model is based on spatially distributed queuing theory and Markovian analysis approximations, and it is one of the most effective approaches for analyzing emergency response systems. In this research, performance measures of the EMS including workloads and mean response times are evaluated using the hypercube model. Modification to the existing …

Topsis As A Method To Populate Risk Matrix Axes, Christian Salmon, Mohammadsadegh Mobin, Afshan Roshani

Mohammadsadegh Mobin

This research utilizes TOPSIS (a Multi-Criteria ranking methodology) to populate the axes of a risk matrix when modeling risk exposure onboard commercial fishing vessels with the intent to identify mitigating interventions in low risk settings for possible transfer to high risk settings. The specific hazard of interest is the release of refrigerants into confined spaces onboard commercial fishing vessels. The metrics of risk are: 1) expectation that refrigerants are released onboard vessels, and 2) consequence of releases that have occurred. To model expectation: data were collected on the United States’ commercial fisheries, including location and number of participating vessels. These …

Multi-Objective X-Bar Control Chart Design By Integrating Nsga-Ii And Data Envelopment Analysis, Mohammadsadegh Mobin, Zhaojun Li, Mahdi Massahi Khoraskani

Mohammadsadegh Mobin

Control charts are widely used in industry to establish and maintain statistical control of a process for quality improvement. Economic use of a control chart calls for designing the optimal parameters for sample size, sampling frequency, and the control limits for the chart. This paper investigates the X-bar control chart design through a two-stage multi-objective optimization process. The multi-objective formulation reflects the multiple objective needs in designing an X-bar control chart. For example, these objectives may include average run length when in statistical control, the type-I error, and the detection power. The optimization process first searches the Pareto Frontiers using …

Proximal Iterative Gaussian Smoothing Algorithm For A Class Of Nonsmooth Convex Minimization Problems, Sanming Liu, Zhijie Wang, Chongyang Liu

Chongyang Liu

In this paper, we consider the problem of minimizing a convex objective which is the sum of three parts: a smooth part, a simple non-smooth Lipschitz part, and a simple non-smooth non-Lipschitz part.

Food Product Target Market Prioritization Using Mcdm Approaches, Mohammadsadegh Mobin, Mohammad Dehghanimohammadabadi, Christian Salmon

Mohammadsadegh Mobin

This paper applies multiple Multi-Criteria Decision Management (MCDM) methods as a mechanism for identifying international markets for a producing nation’s food production. The specific application presented in this paper is for export markets of Iranian Pistachios; however, the model could be applicable across multiple food products and nations. Quantitative and qualitative criteria for market assessment were identified via a literature review. These include: 1) Regulation criterion, 2) Cultural criterion, 3) Transportation distance criterion, 4) Economy criterion, 5) Market potential criterion, 6) Politics criterion, 7) Revealed Comparative Advantage (RCA). Shannon’s Entropy method was applied to weight criteria based upon the context-dependent …

Assessment System Based On Fuzzy Scoring In European Foundation For Quality Management (Efqm) Business Excellence Model, J Dodangeh

Javad Dodangeh

There are a few popular business excellence models that provide standard criteria against which an organization can measure its performances. European Foundation for Quality Management (EFQM) is the most popular one. The organizational self-assessment process is an admissible system in the area of Total Quality Management (TQM). Most specialists concur to the description of self-assessment that is presented by the European Foundation for Quality Management (EFQM). However, the current selfassessment methods in EFQM model have some drawbacks and problems which are scoring in these methods influenced by experts’ judgment and thus, are subjective. Furthermore, these methods cannot consider the empirical …

Designing Fuzzy Multi Criteria Decision Making Model For Best Selection Of Areas For Improvement In Efqm, J Dodangeh

Javad Dodangeh

In a growingly competitive business environment, numerous organizations adopt the total quality management (TQM) approach, to struggle for business excellence. To monitor the progress towards business excellence, thousands of organizations across the world use self-assessment on a regular basis. There are a few popular business excellence models, that provide standard criteria against which an organization can measure its performances. European Foundation for Quality Management (EFQM) is the most popular ones. The EFQM Excellence Model was introduced at the beginning of 1992, as the framework for assessing organizations for the European Quality Award. It is now the most widely used organizational …

An Improved Ant Colony System For A Real Time Routing Strategy, Hannaneh Rashidi-Bajgan, Taravatsadat Nehzati, Napsiah Ismail

Hannaneh Rashidi-Bajgan

There is a large number of literatures about routing and dispatching plans for automated guided vehicle system (AGVS), however a small fraction of these works dealt with dynamic characteristic of this kind of scheduling problems. Current paper surveys a real time strategy to responding requests for supposed material handling system in the plant. We arranged this designing on a preplanned system where all data are known before the constructing routes. An improved ant colony optimization (ACO) is applied in order to find the shortest route path as new solicitations happened. We explore ACO initially for static version of the problem, …

Applying Group Theory For Solving Machines’ Turnovers With Capital Budgeting Approach, Hannaneh Rashidi-Bajgan, Taravatsadat Nehzati, Napsiah Ismail

Hannaneh Rashidi-Bajgan

Applying and utilizing technology in modern manufacturing systems needs to update and upgrade facilities repetitively by efficient ways to stay with great productivity along efficiency. Capital Budgeting Problem (CBP) is one of the most important issues in decision making about capital in manufacturing management; CBP determines the best investments in capital goods such as new plans, replacements, research development projects and other worth pursuing authorization subjects. This problem deals with the amount of revenues as the result of investing in the previous periods in order to maximize the amount of Net Present Value (NPV) on the decision time. Making discussions …

A Multiobjective Genetic Algorithm For Fuzzy Time Windows Vehicle Routing Problem, Hannaneh Rashidi-Bajgan, Taravatsadat Nehzati

Hannaneh Rashidi-Bajgan

Vehicle routing problem (VRP) is a well-known combinatorial optimization problem, holds a central place in logistics management. In the business, transportation, time windows are not always strictly complied and the deviation of service time from specific time window determines the customer’s satisfaction level. The purpose of this paper is to pay about restriction on uploading/delivering time when time constraints are not certain. Therefore this study applies fuzzy membership functions to characterize the service level issues associated with time window violations in VRP with two goals so that minimize the travel cost and maximize the supplier’s service level. In facing to …

A Novel Approach In Determining Points Of Interactive Transportations In The Firm, Zeinab Barati, Hannaneh Rashidi-Bajgan, Elham Esmaili

Hannaneh Rashidi-Bajgan

Partitioning is the most vital element in designing of a firm layout. Today modern working environments are intended to more use of less space which could increase more interactions between related departments. Although progress communications network has reduced the need for physical transportation but the tangible connections between different parts of a firm seems essential still. The firm is willing to reduce transfers to the minimum possible in order to prevent the vain crowd and time stuck. The purpose of this paper is to use a new approach of decision making in the location and layout of firm’s partitions. With …

A Madm Method For Office˗ Job Assignment Problem, Elham Esmaili, Hannaneh Rashidi-Bajgan, Zeinab Barati

Hannaneh Rashidi-Bajgan

There are different kinds of jobs in any organization; some of them have more traffic to one another, in the other words there are communicative rates between these office jobs. In this paper we want to develop an approach of analytical hierarchy process (ANP) so that enable us in assigning jobs to suitable office rooms. We suppose that we know distances between places and could predict the amount of flow movements between theses jobs and would like to minimize the distance×flow.

The Optimization Of The Threshold For The Preventive Maintenance Actions In A Condition-Based Maintenance Program Via Dynamic Programming Approach, Kamran Shahanaghi, Mehdi Jafarian, Majid Beikverdi, Zeinab Nezhadbiglari

Mehdi Jafarian

The last step of a condition based maintenance (CBM) program is maintenance decision-making. This step is the most important and the most critical stage of maintenance for executive personnel and management whom work on taking maintenance actions. This decision making would be done according to certain criteria such as risk, cost, reliability and availability. This paper considered a dynamic programming model to optimization of the threshold for the preventive maintenance actions in a condition-based maintenance program. The basis of this modeling is the average cost of maintenance actions, failures and exchanges. In this paper, we improved the memory of the …

Applying Dynamic Programming For Cargo Loading Problem, Hannaneh Rashidi-Bajgan

Hannaneh Rashidi-Bajgan

No abstract provided.

Introduction To Maxmin Layout Problem, Hannaneh Rashidi-Bajgan

Hannaneh Rashidi-Bajgan

No abstract provided.

Introduction Of Applying Group Theory, Hannaneh Rashidi-Bajgan

Hannaneh Rashidi-Bajgan

No abstract provided.

Y Ahora Con Quién Tenemos Que Pactar? Modelo Matemático Para La Obtención De Coaliciones De Gobierno En Una Democracia Parlamentaria, Jaime Gil-Lafuente, Julio Rojas-Mora, Rodrigo Acuna-Agost

Julio Rojas-Mora

Durante el período de vida democrática española, hemos ido observando, reiteradamente, innumerables puzzles surgidos del resultado de unas elecciones generales, autonómicas o municipales que, como solución, dan paso a gobiernos compuestos por alianzas, momentáneas o duraderas, de varios partidos políticos.

En muchas democracias, es condición sine qua non, después de unas elecciones, que los partidos políticos que quieran gobernar sumen un número de representantes que supere el 50% del total de representantes. Ello provoca un periodo de mayor o menor incertidumbre originado por conocer, en principio, cuáles podrán ser los pactos y con qué partidos se alcanzará un gobierno considerado …

The Signing Of A Professional Athlete: Reducing Uncertainty With A Weighted Mean Hemimetric For Fuzzy Subsets, Julio Rojas-Mora, Jaime Gil-Lafuente

Julio Rojas-Mora

In this paper we present a tool to help reduce the uncertainty presented in the decision-making process associated to the selection and hiring of a professional athlete. A weighted mean hemimetric for fuzzy subsets with trapezoidal fuzzy numbers (TrFN) as their elements, allows to compare candidates to the “ideal” player that the technical body of a team believes should be hired.

A New Multiobjective Modeling In Distribution Center Location Problem, Mehdi Jafarian, Azizolah Jafari, Mehdi Sharif-Yazdi, Seyed Javad Hosseininejad

Mehdi Jafarian

As has been mentioned in the literature, distribution centers location problem (DCLP) is a multiobjective problem. Cost (or distance) minimization is the primary objective in this area. While significance of each relation between a distribution center (DC) and a customer/retailer is different, it has not been considered seriously. By adapting available facility and new facility concepts of the multifacility location problem with costumer/retailer and a DC respectively, a utility function as the second objective based on the importance has been used. These importances are in decision maker (DM) s’ mind which should be quantified to be of use for modeling …

Lexicographic Goal Programming Approach For Portfolio Optimization, Mehdi Jafarian, Azizolah Jafari

Mehdi Jafarian

The mean variance model of portfolio optimization that was introduced by Markowitz includes two conflicted objective functions. These two criteria, risk and return does not encompass all of the information about investment. Information like liquidity, annual dividends and performance in later years. Thus portfolio selection is a usual multi-objective decision making (MODM) problem. This paper will investigate the optimum portfolio for a private investor, taking into account 6 criteria. It is well known that GP, based on preemptive priorities and target values, has been successful in solving MODM problems. In this paper we classify the MODM model with consideration of …

Ranking Maintenance Strategies From The Point Of View Of Lean Thinking: Group Decision Making Model By Using Borda Method, Mehdi Jafarian, Kamran Shahanaghi, Aliakbar Faegh, Majid Samsami

Mehdi Jafarian

The selection of maintenance strategies is a typical multiple criteria decision-making (MCDM) problem. There have been taken different maintenance strategies in order to obtaining optimistic maintenance strategy. In this paper we aim to rank different maintenance strategies from the point of view of lean thinking. After obtaining information from experts whose expertness is in field of maintenance, in order to ranking these strategies we form a group decision making model and solve this model by using Borda method. Finally we analyze its results

An Introduction To Maintenance, Kamran Shahanaghi, Mehdi Jafarian

Mehdi Jafarian

در فضای رقابتی امروز، بنگاه‏های اقتصادی در تلاشی مستمر برای دستیابی به کیفیت بالا، هزینه پایین، افزایش سرعت در ارائه کالا و خدمات و ... می‏باشند. بنابراین دستیابی به اهداف فوق را می‏توان در زمره مهمترین دغدغه‏های مدیران امروزی قلمداد نمود. نگهداری و تعمیرات نیز به عنوان یکی از مهمترین فرآیندهای یک بنگاه اقتصادی از این قاعده مستثنا نبوده و در زیر ذره بین مدیران و کارشناسان قرار گرفته است. در این مقاله سعی نویسندگان بر این بوده است تا برخی از مهمترین جنبه‏های پژوهشی مطرح در این حوزه را عنوان نمایند.

Optimization Models For The Single Machine Scheduling Problem With A Single Flexible Maintenance Activity And Stochastic Maintenance Activities Time, Kamran Shahanaghi, Azizolah Jafari, Mehdi Jafarian, Hamid Babaei, Hojat Mehrazmay, Majid Beikverdi, Ahmad Yazdian

Mehdi Jafarian

In this paper, modeling and solving of a single machine scheduling problem with a single flexible maintenance activity and stochastic maintenance activities time was considered. Also it assumes that the all activities are resumable. Chen solved and investigate complexity of this problem without probabilistic condition by Mixed binary integer programming (BIP) so we solving this problem with considering stochastic programming concepts. An example has investigated at the end chapter to show actual consequences by Lingo.

The Optimization Of The Threshold For The Preventive Maintenance Actions In A Condition-Based Maintenance Program Via Dynamic Programming Approach, Mehdi Jafarian, Majid Beikverdi, Kamran Shahanaghi, Zeinab Nezhadbiglari

Mehdi Jafarian

The last step of a condition based maintenance (CBM) program is maintenance decision-making. This step is the most important and the most critical stage of maintenance for executive personnel and management whom work on taking maintenance actions. This decision making would be done according to certain criteria such as risk, cost, reliability and availability. This paper considered a dynamic programming model to optimization of the threshold for the preventive maintenance actions in a condition-based maintenance program. The basis of this modeling is the average cost of maintenance actions, failures and exchanges. In this paper, we improved the memory of the …

Cbm With Economic Decision Making: A New Modelling By Markov Chain, Kamran Shahanaghi, Mehdi Jafarian

Mehdi Jafarian

فعالیت های نگهداری و تعمیرات در هر بنگاه اقتصادی از یک سو سبب کاهش هزینه های ناشی از عدم فعالیت دستگاه ها، هزینه های تعمیرات و سود از دست رفته، شده و از سوی دیگر به عنوان فعالیتی هزینه بر، هزینه های گاها سنگینی را به سازمان وارد می¬سازد. از این رو توسعه سیاست های نگهداری و تعمیرات و بهینه سازی هر یک از این سیاست ها، عاملی مهم در کاهش هزینه های سازمان خواهد بود. در این میان فرآیند نگهداری و تعمیرات مبتنی بر شرایط، به عنوان یکی از کاراترین سیاست¬های نگهداری و تعمیرات، با حذف فعالیت های نگهداری …