تعیین سیاست بهینه سفارش‌دهی در مدل چند دوره‌ای احتمالی با در نظر گرفتن قیمت خرید تصادفی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد مهندسی صنایع، دانشکده مهندسی، دانشگاه کردستان، سنندج، ایران

2 استادیار گروه مهندسی صنایع، دانشکده مهندسی، دانشگاه کردستان، سنندج، ایران

چکیده

در این مقاله مسئله برنامه‌ریزی و کنترل موجودی دو دوره‌ای با تقاضای احتمالی موردبررسی قرار می‌گیرد. در این سیستم فقط در اول دوره امکان سفارش‌دهی وجود دارد. تقاضا در طول دوره اول تصادفی و از توزیع مشخصی پیروی می‌کند و تقاضا برای محصولات باقیمانده در پایان دوره اول، وابسته به قیمت فروش آن در طول دوره دوم است. در این حالت قیمت فروش محصولات پایان دوره اهمیت زیادی پیدا می‌کند به‌گونه‌ای که قیمت کم باعث فروش بیشتر می‌شود. همچنین در مسئله موردبررسی فرض شده است که قیمت خرید محصولات در اول دوره یک فرآیند تصادفی و وابسته به زمان است. برای مسئله بیان شده مدل ریاضی ارائه‌شده است و سپس سعی می‌شود براساس نگرش برنامه‌ریزی پویا احتمالی، مقدار بهینه قیمت فروش پایان دوره، مقدار بهینه سفارش‌دهی و قیمت خرید محصولات به‌منظور ماکزیمم کردن سود سیستم تعیین گردد. در نهایت با بیان مثال عددی به بررسی عملکرد مدل بیان شده و تحلیل حساسیت آن پرداخته می‌شود.

کلیدواژه‌ها


عنوان مقاله [English]

Determining The Optimal Ordering Policy In A Multi-Period Stochastic Model With The Uncertainty Purchase Price

نویسندگان [English]

  • Zahra Rajabi 1
  • Heibatolah Sadeghi 2
  • Anwar Mahmoodi 2
1 Department of industrial of engineering, Faculty of engineering, University of Kurdistan, Sanandaj, Iran
2 Assistant Professor, Department of Industrial Engineering, University of Kurdistan, Sanandaj, Iran
چکیده [English]

This paper deals with a two-period inventory planning and control problem with stochastic demand. In this system, a distributor can order the products in a preseason period and sell them in two subsequent selling periods. Demand during the first period is a random variable with a known probability distribution, while the demand for the remaining products at the end of the first period depends on their selling price during the second period. Therefore, the selling price of end-of-period products is very important so that a low price will achieve more sales. It is also assumed that the purchase price of the products in the preseason period is a time-dependent and follows a random process. For the considered problem, a mathematical model is suggested and then using the probabilistic dynamic planning approach, the optimal selling price at the second period, the optimal ordering quantity, and the purchase price of the products are determined to maximize the system profit. Finally, a numerical example is presented to investigate the performance of the model, and the sensitivity analysis of the main parameters.

کلیدواژه‌ها [English]

  • Multi period news vendor
  • Pricing
  • Random process
  • Probabilistic dynamic programming
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