ارائه مدل ریاضی زنجیره تأمین سبز پروژه‌های ساخت‌وساز با در‌نظر گرفتن زمان‌بندی پروژه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد، دانشگاه علم و صنعت.

2 دانشیار، دانشگاه علم و صنعت.

3 استادیار، دانشگاه علم و صنعت.

4 دانشجوی دکتری، دانشگاه علم و صنعت.

چکیده

زنجیره تأمین ساخت‌وساز با چالش‌های بسیاری مواجه است که از مهم‌ترین آن‌ها می‌توان به اتلاف بیش‌ازحد منابع در سایت پروژه و همچنین میزان بالای انتشار آلاینده‌ها در این نوع از زنجیره‌های تأمین اشاره کرد؛ از سوی دیگر، اغلب مدیران این نوع از زنجیره‌ها ملزم به یکپارچه در نظر‌گرفتن زنجیره تأمین از قبیل ویژگی‌های زمانی و منابع پروژه، تعیین سطح تولید و موجودی و تعیین تعداد و نوع وسایل نقلیه در آن هستند تا هزینه‌های آن به‌صورت بهینه تعیین شود؛ به همین منظور، در این مقاله مدلی یکپارچه ارائه شده که هدف نخست بیشینه‌سازی سود و هدف دوم کمینه‌سازی میزان انتشار گاز کربن دی‌اکسید است؛ به‌طوری‌که راهکاری نیز برای جلوگیری از اتلاف منابع در سایت پروژه ارائه شده است. با فرض مشخص‌بودن شبکه پروژه و همچنین مدت‌زمان و تقاضای روزانه هر یک از فعالیت‌ها، این مدل، برنامه‌ریزی زنجیره را در دوره‌های زمانی مختلف انجام می‌دهد. با توجه به دوهدفه و غیرخطی‌بودن این مدل، ابتدا مدل، خطی و سپس با استفاده از روش محدودیت اپسیلون و کدنویسی در نرم‌افزار GAMS حل شد و درنهایت نتایج آن با استفاده از دو مثال عددی مورد‌تحلیل قرار گرفت.

کلیدواژه‌ها

عنوان مقاله [English]

A Mathematic Model for Green Supply Chain of Project Construction considering Project Scheduling

نویسندگان [English]

  • Amir Bayani Majd 1
  • Syamak Noori 2
  • Saeed Yaghoubi 3
  • Ahmad Mohamadi 4
1 MSc Student, Iran University of Science and Technology.
2 Associate Professor, Iran University of Science and Technology.
3 Assistant Professor, Iran University of Science and Technology.
4 Ph.D Student, Iran University of Science and Technology.
چکیده [English]

The construction supply chain encounters with a lot of challenges that one of the most significant can refer to the higher sources wasting in project site and also the high pollution on amount of this type of supply chains. On the other hand, the most managers of supply chains need to the integration of supply chain such as project sources and time specifics, determining the production and inventory level, and also determining numbers and type of vehicles that are included, in order to its cost is calculated in an optimal form. For this purpose, in this article an integrated model has been proposed which first objective function is maximizing the profit, and the second objective amount is minimizing the emission of the carbon dioxide gas, whereas a solution way for the prevention of sources waste in project site is presented.  With assumption of determining project network and also the durations and daily demand of each activity, this supply chain model pans the different periods of time. To consider this bi-objective and nonlinear model, the model has been first linearized, and by using the epsilon-constraint method and also coding in GSMS software has been solved and its results have been finally analyzed with two numerical examples. 

کلیدواژه‌ها [English]

  • Construction Supply Chain
  • Green Supply Chain
  • Project Scheduling

مراجع

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