محسن شفیعی نیک آبادی
استادیار دانشکدة اقتصاد و مدیریت دانشگاه سمنان
[ 1 ] - الگوریتم بهینه‌سازی گروه ذرات برای تعیین اندازة انباشته و زمان‌بندی یکپارچه در محیط تولیدی جریان کارگاهی
هدف این پژوهش مطالعة سیستم‌های تولیدی چندمحصولی و چنددوره‌ای در محیط جریان کارگاهی است؛ طوری که محدودیتهای تولید و توالی عملیات به صورت یکپارچه لحاظ شود. مدل برنامهریزی عدد صحیح مختلط برای مسئله پیشنهاد میشود. تابع هدف شامل هزینههای تولید، موجودی، کمبود، و راهاندازی است. با توجه به پیچیدگی زیاد محاسباتی، الگوریتم بهینه‌سازی گروه ذرات برای حل پیشنهاد میشود. جهت بررسی کارایی الگوریتم، دو...
[ 2 ] - ارائه‌ی مدل انتخاب تأمین‌کننده برای قراردادهای همکاری با در نظر گرفتن عملکرد تحویل تأمین‌کننده در امداد بشردوستانه
امروزه یکی از رویکردهای پیشنهادشده برای کاهش زمان پاسخ در عملیات امدادرسانی سازمان‌های بشردوستانه استفاده از تفاهم‌نامه‌های همکاری برای تأمین اقلام حیاتی است. تأمین‌کنندگان در طول افق زمانی تفاهم‌نامه و در صورت نیاز سازمان امدادی موظف به تحویل اقلام حیاتی هستند. در این مقاله، مدلی برای انتخاب تأمین‌کنندگان اقلام امدادی در قالب قراردادهای همکاری، با توجه به عملکرد زمان تحویل (سرعت عمل) تأمین‌کنن...
[ 3 ] - Design of a Hybrid Genetic Algorithm for Parallel Machines Scheduling to Minimize Job Tardiness and Machine Deteriorating Costs with Deteriorating Jobs in a Batched Delivery System
This paper studies the parallel machine scheduling problem subject to machine and job deterioration in a batched delivery system. By the machine deterioration effect, we mean that each machine deteriorates over time, at a different rate. Moreover, job processing times are increasing functions of their starting times and follow a simple linear deterioration. The objective functions are minimizin...
[ 4 ] - Monte Carlo Simulation to Compare Markovian and Neural Network Models for Reliability Assessment in Multiple AGV Manufacturing System
We compare two approaches for a Markovian model in flexible manufacturing systems (FMSs) using Monte Carlo simulation. The model which is a development of Fazlollahtabar and Saidi-Mehrabad (2013), considers two features of automated flexible manufacturing systems equipped with automated guided vehicle (AGV) namely, the reliability of machines and the reliability of AGVs in a multiple AGV jobsho...
[ 5 ] - A Benders� Decomposition Approach for Dynamic Cellular Manufacturing System in the Presence of Unreliable Machines
In order to implement the cellular manufacturing system in practice, some essential factors should be taken into account. In this paper, a new mathematical model for cellular manufacturing system considering different production factors including alternative process routings and machine reliability with stochastic arrival and service times in a dynamic environment is proposed. Also because of t...
[ 6 ] - Developing a Multi-objective Mathematical Model for Dynamic Cellular Manufacturing Systems
This paper is in search of designing the cellular manufacturing systems (CMSs) under dynamic and flexible environment. CM is proper for small-to-medium lot production environment that helps the companies to produce variable kind of productions with at least scraps. The most important benefits of CM are decline in material handling, reduction in work-in-process, reduction in set-up time, increme...
[ 7 ] - The Identifying, Evaluating and Prioritizing the Factors Affecting Customers’ Satisfaction with E-service Centers of Iran's Police
The present research is classified as an applied one employing a descriptive survey design to describe the status quo of the factors affecting customers’ satisfaction with the E-service centers of Iran’s police, known as 10 + police centers. The research population involves all the costumers of the 10+ police centers, among which 420 individuals were chosen through simple random sampling techni...
[ 8 ] - A Mathematical Model for Integrating Cell Formation Problem with Machine Layout
This paper deals with the cellular manufacturing system (CMS) that is based on group technology concepts. CMS is defined as identifying the similar parts that are processed on the same machines and then grouping them as a cell. The most proposed models for solving CMS are focused on cell formation problem while machine layout is considered in few papers. This paper addresses a mathematical mo...
[ 9 ] - Developing Goodson’s model for rapid performance assessment of emergency department
Over the past years, raising costs of health care in most countries cause to attract more attention to different aspects in the field. One of the best improvement methodologies known in literature is based on lean principles. The main aim of this methodology is to create values in the system by eliminating losses and creating continuous efforts toward improvement. Therefore, by measuring the pe...
[ 10 ] - An integrated production and preventive maintenance planning model with imperfect maintenance in multi-state system
Production planning and maintenance are two important problems in manufacturing systems. Despite the relationship exists between these two problems due to sudden failures and production capacity occupied by maintenance activities, each of these problems planned separately and as a result program and model efficiencies reduce in the real world. The aim of integrated production and maintena...
[ 11 ] - A location-allocation model in the multi-level supply chain with multi-objective evolutionary approach
In the current competitive conditions, all the manufacturers’ efforts are focused on increasing the customer satisfaction as well as reducing the production and delivery costs; thus, there is an increasing concentration on the structure and principles of supply chain (SC). Accordingly, the present research investigated simultaneous optimization of the total costs of a chain and customer satisfa...
[ 12 ] - A two stage model for Cell Formation Problem (CFP) considering the inter-cellular movements by AGVs
This paper addresses to the Cell Formation Problem (CFP) in which Automated Guided Vehicles (AGVs) have been employed to transfer the jobs which may need to visit one or more cells. Because of added constraints to problem such as AGVs’ conflict and excessive cessation on one place, it is possible that AGVs select the different paths from one cell to another over the time. This means that the ti...
[ 13 ] - استفاده از تکنیک‌های داده‌کاوی در تامین دانش برای یک سیستم تصمیم یار (موردکاوی شرکت اتوبوسرانی تهران)
در این مطالعه داده‌های تخلفات شرکت اتوبوسرانی تهران با استفاده ازتکنیک های داده‌کاوی مورد بررسی و به کشف دانش پنهان میان داده‌ها پرداخته شده است. در ابتدا داده‌های تخلفات شرکت‌های پیمانکار اتوبوسرانی تهران در حدفاصل سال‌های 1391 تا 1394 جمع‌آوری و جهت ورود به نرم‌افزار آماده‌سازی گردید. در مرحله بعد با بهره‌مندی از الگوریتم‌های قوانین انجمنی و درخت تصمیم جهت استخراج دانش استفاده شده است. تعیین ...
[ 14 ] - A Two-dimensional Warranty Model with Consideration of Customer and Manufacturer Objectives Solved with Non-dominated Sorting Genetic Algorithm
Warranty is a powerful implement for marketing strategy that is used by manufacturersand creates satisfaction for consumers by ensuring to compensate for incorrect operation of the product. Warranty serviceresults ina cost named warranty cost for a manufacturer.This cost is a function of warranty policy, regions, and product failures pattern. Since this service coversthe cost of uncertain failu...
[ 15 ] - Application of Markov Processes to the Machine Delays Analysis
Production and non-productive equipment and personnel delays are a critical element of any production system. The frequency and length of delays impact heavily on the production and economic efficiency of these systems. Machining processes in wood industry are particularly vulnerable to productive and non-productive delays. Whereas, traditional manufacturing industries usually operate on homoge...
[ 16 ] - Economic Analysis of Implementing Respirator Program or Ventilation System in a Manufacturing Environment
The techniques and methods of developing cost models for respirators are discussed. Models are developed and implemented in this study for nineteen types of respirators in two major classes (air-purifying and supplied-air) and one LEV system. One respirator model is selected for detailed discussion from among the twenty models. The technical cost method is used in constructing the cost models f...
[ 17 ] - Turbine Blade Investment Casting Cost Estimating Model (TECHNICAL NOTES)
The objective of this research is to develop a turbine blade investment casting cost advisor model to assist a blade designer in decision-making in a concurrent engineering environment. It is a microcomputer based cost estimating system that employs a manufacturing knowledge base. The concept of the manufacturing process for blade production by the investment casting method is used to develop t...
[ 18 ] - An Integrated Hydrocarbon Biofuel and Petroleum Supply Chain: Designing and Planning a Dynamic Supply Chain Network
One of the main challenges of bioenergy sector development is the cost of biomass supply chain resulted from inefficient bioenergy production from low energy content biomass feedstocks, high logistics costs of biomass production, handling and transportation. Another main aspect to be considered is that the configuration of a biofuel supply chain can be dynamic which evolve over time. Growing de...
[ 19 ] - An Integrated Hydrocarbon Biofuel and Petroleum Supply Chain: Designing and Planning a Dynamic Supply Chain Network
One of the main challenges of bioenergy sector development is the cost of biomass supply chain resulted from inefficient bioenergy production from low energy content biomass feedstocks, high logistics costs of biomass production, handling and transportation. Another main aspect to be considered is that the configuration of a biofuel supply chain can be dynamic which evolve over time. Growing de...
[ 20 ] - Study of buffer effects on the grouping efficacy measure of stochastic cell formation problem
This paper deals the stochastic cell formation problem (SCFP). The paper presents a new nonlinear integer programming model for the SCFP in which the effect of buffer size on the grouping efficacy of cells has been investigated. The objective function is the maximization of the grouping efficacy of cells. A chance constraint is applied to explore the effect of buffer on the SCFP. Processing tim...
[ 21 ] - Ranking Locations Based on Hydrogen Production from Geothermal in Iran Using the Fuzzy Moora Hybrid Approach and Expanded Entropy Weighting Method
The present study aimed at ranking and selecting the superior geothermal project for hydrogen production in 14 provinces of Iran using a multi-objective optimization fuzzy hybrid approach through analyzing the ratio (fuzzy Moora) and expanded entropy weighting method. In this research, the extended entropy weighing method and the Fuzzy-Moora approach were utilized to weigh the criteria and proj...
[ 22 ] - The Ranking of Southern Ports and Islands of Iran for Seawater Desalination Plants Using ELECTRE III Method
The energy insecurity, environmental pollution, climate change and even reduced rainfall in some countries are prime examples of consequences of the world’s excessive reliance on fossil fuels. This study suggests that in some southern islands and coastal areas of Iran, two such problems, namely the growing shortage of potable water and air pollution can be addressed by building a wind-p...
[ 23 ] - A Mathematical Model for Multiple-Load AGVs in Tandem Layout
Reducing cost of material handling has been a big challenge for companies. Flexible manufacturing system employed automated guided vehicles (AGV) to maintain efficiency and flexibility. This paper presents a new non-linear mathematical programming model to group n machines into N loops, to make an efficient configuration for AGV system in Tandem layout. The model minimizes bot...
[ 24 ] - حل مسئله زمان‌بندی و مسیریابی سبز وسایل حمل‌ونقل با ناوگان ناهمگن شامل لجستیک معکوس به شکل جمع‌آوری کالاهای بازگشتی با الگوریتم ژنتیک
مسئله مسیریابی وسایل نقلیه (VRP)، یافتن مسیرهای بهینه برای ناوگانی از وسایل است که با سفر در آن مسیرها، تقاضای مشتریان برآورده میگردد. این مسئله از پرکاربردترین مسائل در حوزه حمل‌ونقل و تدارکات است. در این مقاله، مسئله زمان‌بندی و مسیریابی سبز وسایل حمل‌ونقل با ناوگان ناهمگن شامل لجستیک معکوس به شکل جمع‌آوری کالاهای بازگشتی، توسعه داده شده است. این مسئله همراه با هزینه‌ها...
[ 25 ] - Error assessment in man-machine systems using the CREAM method and human-in-the-loop fault tree analysis
Background and Objectives: Despite contribution to catastrophic accidents, human errors have been generally ignored in the design of human-machine (HM) systems and the determination of the level of automation (LOA). This paper aims to develop a method to estimate the level of automation in the early stage of the design phase considering both human and machine performance. Methods: A quantita...
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