R. Kazemi Matin

[ 1 ] - Estimating ‎U‎pper and Lower Bounds For Industry Efficiency With Unknown ‎Technology‎

With a brief review of the studies on the industry in Data Envelopment Analysis (DEA) framework, the present paper proposes inner and outer technologies when only some basic information is available about the technology. Furthermore, applying Linear Programming techniques, it also determines lower and upper bounds for directional distance function (DDF) measure, overall and allocative efficienc...

[ 2 ] - مدل بندی عوامل غیر قابل کنترل در اندازه گیری کارایی شرکت های برق منطقه ای ایران

تحلیل پوششی داده‌ها (DEA) یک روش غیر پارامتریک برای اندازه‌گیری کارایی مجموعه‌ای از واحدهای تصمیم گیری است که مجموعه‌ای از ورودی‌ها را به مجموعه‌ای از خروجی‌ها تبدیل می‌کند. مدل‌های رایج DEA معمولاً برای داده‌های قابل کنترل ارائه شده‌اند و داده‌هایی که خارج از کنترل انسان و تحت تاثیر عواملی مانند عوامل محیطی هستند را بررسی نمی‌کنند. در ادبیات اخیر DEA روش‌هایی برای بررسی کارایی سیستم‌های تولید ب...

[ 3 ] - Evaluating Subunits Importance in Performance Measurement of Network Systems in Data Envelopment Analysis

In conventional DEA models, decision making units (DMUs) are generally assumed as a black-box while the performance of decision making sub-units (DMSUs) and their importance play crucial roles in  analyzing the performance of systems which have internal processes. The present paper introduces an ideal network which have efficient processes and next purposes a new approach for evaluating importa...

[ 4 ] - مطالعه ی تاثیر فاکتورهای انقباضی اصل دسترسی پذیری ضعیف در تحلیل پوششی داده های شبکه ای با خروجی های نامطلوب

Applying weak disposability assumption of outputs is a common way in Data Envelopment Analysis in dealing with undesirable outputs. Two different approaches are proposed in the literature for modeling weak disposability axiom. In this paper, the technologies created with uniform and distinct abatement factors for decision making units are investigated in network DEA framework. The related DEA m...

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[ 7 ] - Estimating ‎C‎apacity Utilization in Two-Stage Production Systems: A Data Envelopment Analysis Approach

The current study investigates performance in two-stage production systems through the measurement of capacity utilization (CU). In short-run, the degree of capacity utilization depends on the ability of decision making units to utilize fixed production factors. To develop this indicator in two-stage production processes, a modified SBM network DEA model is proposed. A numerical example is also...