اندازه‌گیری اسلک‌های ناکارایی سیستم‌های شبکه‌ای در حضور منابع مشترک
الموضوعات :
حسین عزیزی
1
,
شهروز فتحی اجیرلو
2
1 - گروه ریاضی، واحد پارس‌آباد مغان، دانشگاه آزاد اسلامی، پارس‌آباد مغان، ایران
2 - گروه ریاضی، واحد پارس‌آباد مغان، دانشگاه آزاد اسلامی، پارس‌آباد مغان، ایران
الکلمات المفتاحية: Data Envelopment Analysis, overall performance, optimistic and pessimistic views, inefficiency slacks, Additive model,
ملخص المقالة :
ارزیابی عملکرد یکی از کارهای مهم در مدیریت به منظور درک بهتر موفقیت‌های گذشته‌ی یک واحد تولیدی و برنامه‌ریزی برای توسعه‌ی آینده‌ی آن است. هدف مشخص کردن آن است که چقدر می‌توان انتظار داشت که واحد مورد نظر با مقدار کنونی ورودی بتواند خروجی خود را افزایش دهد، یا اینکه ضمن تولید میزان کنونی خروجی، صرفاً با افزایش کارایی، چقدر می‌توان در ورودی صرفه‌جویی کرد. یک سیستم معمولاً متشکل از بخش‌های متعدد است، که هر کدام کارکردهای خاصی را انجام می‌دهند. وقتی که به عملکرد سیستم به‌عنوان یک واحد کامل علاقه‌مند هستیم، که در آن فقط ورودی‌های وارد شده به سیستم و خروجی‌های خارج شده از سیستم در نظر گرفته می‌شوند، به آن تحلیل واحد کامل یا جعبه‌ی سیاه می‌گویند، زیرا اینکه چگونه ورودی‌ها از طریق محصولات بینابینی به خروجی‌ها تبدیل می‌شوند، مورد توجه نیست. تحلیل واحد کامل، ایده‌ای کلی از عملکرد یک واحد را به دست می‌دهد. با این حال، از آنجا که یک سیستم معمولاً متشکل از چندین بخش است که به‌طور وابسته به هم عمل می‌کنند، لذا صرف نظر کردن از عملیات بخش‌های تشکیل دهنده ممکن است نتایج گمراه کننده‌ای را در پی داشته باشد. برای ارزیابی صحیح عملکرد یک سیستم، این مقاله مجموعه‌ای از مدل‌های جمعی ارائه می‌کند. مدل‌های پیشنهادی، اسلک‌های ناکارایی یک سیستم را از دو دیدگاه خوشبینانه و بدبینانه اندازه‌گیری می‌کنند. لذا یک ارزیابی کلی از عملکرد هر سیستم به دست می‌آید. مثالی از صنعت بانکداری در ایران برای توضیح دادن چگونگی محاسبه‌ی اسلک‌های ناکارایی‌های سیستم و فرآیندها ارائه می‌شود.
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