An Extension of the Earned Value Management to Improve the Accuracy of Schedule Analysis Results

Document Type: Research Paper

Authors

1 Faculty of Industrial and Mechanical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran

2 Department of Mathematics, Qazvin Branch, Islamic Azad University, Qazvin, Iran

Abstract

A project is any endeavor involving planned action, for example, developing a new product or constructing a dam. [CE1] Major factors for a project to be successful are applying performance measurement and feedback tool. One such well-known performance measurement tool to control the project execution is earned value management (EVM). EVM uses the fundamental principle that trends in the past can be good predictors of the future. It was originally developed to follow time and cost of a project, but it has some weak points in analyzing the time performance of a project. In this article, we first explain these weak points in detail. Then, to improve them, we develop two methods: the first one is a simple and approximation method to minimize errors in EVM analysis with a high probability and the second method is an exact approach that uses earned value and floating time concepts. At the end, the performance of the proposed methods is evaluated and analyzed on a set of instances containing a variety of project sizes. The results of this experimentation show that the efficiency of the methods is relatively good.

Keywords

Main Subjects


Article Title [Persian]

توسعه‌ای بر تحلیل‌های مدیریت ارزش کسب‌شده برای مدیریت پروژه‌ها

Authors [Persian]

  • امیر نجفی 1
  • فاطمه عظیمی 2
1 دانشکدة مهندسی صنایع و مکانیک، واحد قزوین، دانشگاه آزاد اسلامی ، قزوین، ایران
2 گروه ریاضی، واحد قزوین، دانشگاه آزاد اسلامی، قزوین، ایران
Abstract [Persian]

پروژه‌ها طیف وسیعی از امور مشتمل بر توسعة محصول جدید تا ساخت سد را در بر می‌گیرند. از جمله عوامل کلیدی موفقیت پروژه‌ها، به‌کارگیری ابزار مناسب جهت ارزیابی عملکرد است. مدیریت ارزش کسب‌شده، یکی از ابزارهای متداول ارزیابی عملکرد پروژه‌هاست. مدیریت ارزش کسب‌شده به منظور تحلیل عملکرد هزینه و زمان پروژه توسعه پیدا کرد، ولی نقاط ضعفی در تحلیل‌های عملکرد زمانی پروژه دارد. در این مقاله، این نقاط ضعف را تشریح و دو روش به منظور رفع آن ارائه می‌کنیم. روش اول، روشی ساده و تقریبی است که مقدار خطا در تحلیل‌های زمانی را با احتمال بالا به حداقل می‌رساند. روش دوم روش دقیقی است که از مفاهیم ارزش کسب‌شده و زمان شناوری استفاده می‌کند. در پایان مقاله، عملکرد دو روش توسعه‌یافته را بررسی می‌کنیم. نتایج نشان می‌دهد که روش‌های توسعه‌یافته عملکرد خوبی دارد.

Keywords [Persian]

  • ارزش کسب‌شده
  • تأخیر پروژه
  • تحلیل زمان‌بندی
  • مدیریت پروژه
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