Sadoullah Ebrahimnejad
Assistant Professor, Department of Industrial Engineering, , Karaj Branch, Islamic Azad University, Karaj , Iran
[ 1 ] - Using Hybrid Fuzzy PROMETHEE II and Fuzzy Binary Goal Programming for Risk Ranking: A Case Study of Highway Construction Projects
Multi attribute decision making methods are considered as one of the most useful methods for solving ranking problems. In some decision making problems, while the alternatives for corresponding criteria are compared in a pairwise comparison manner, if the criteria are inherently fuzzy, debates will arise in ranking alternatives due to the closeness of the values of the criteria. In this researc...
[ 2 ] - ارائه روش بهبودیافته خاکستری جهت ارزیابی قابلیت ارتجاعی شبکه تأمین سبز دفاعی
لزوم ارزیابی و توجه به شبکه همکاران دفاعی به‌عنوان یکی از اهداف راهبردی دکترین دفاعی کشور به‌ویژه در ابعاد فنی، کمی، کیفی و رشد و توسعه فنّاوری‌های دفاعی در سال‌های اخیر به‌واسطه سیاست‌های انقباضی دولت به‌منظور مدیریت بهینه منابع و هزینه‌ها و کاهش بهای تمام‌شده محصولات از اهمیت بالایی برخوردار شده است. استفاده از مفهوم قابلیت ارتجاعی به‌عنوان یکی از مفاهیم جدید در مدیریت زنجیره تأمین و ارزیابی ق...
[ 3 ] - موازنه معیارهای هزینه ، زمان و کیفیت در یک شبکه CPM با استفاده از منطق فازی و الگوریتم ژنتیک
Improving the quality of the projects and decreasing the time and cost of performing them are the major goals in performing process of the projects. Project managers pursue these goals by allocating the resources properly and making the best decisions. Since most of the previous works has been done under unrealistic and certain conditions and there has always been a deficit in project manager’s...
[ 4 ] - زمانبندی جریان کارگاهی مونتاژ با زمان آماده‌سازی وابسته به توالی و زمان حمل و نقل
In this paper, three-stage assembly flowshop scheduling is considered with respect to minimizing bi-objectives, namely mean flow time and mean tardiness. This problem is a model of production systems, which several production operations are done simultaneously and independently, and then produced components are collected and transferred to an assembly stage for the final operation. In this mode...
[ 5 ] - Development of a Model for Locating Hubs in a Competitive Environment under Uncertainty: A Robust Optimization Approach
This article explores the development of previous models to determine hubs in a competitive environment. In this paper, by comparing parameters of the ticket price, travel time and the service quality of hub airports, airline hubs are divided into six categories. The degree of importance of travel time and travel cost are determined by a multivariate Lagrange interpolation method, which can pla...