انتخاب و زمان‌بندی پروژه چندحالتی با منابع محدود با در نظر گرفتن امکان سرمایه‌گذاری مجدد در افق زمانی انعطاف‌پذیر
نویسندگان
1 دانشکده فنی و مهندسی، گروه مهندسی صنایع، دانشگاه خوارزمی، تهران
2 دانشکده مهندسی صنایع و سیستم‌های مدیریت، دانشگاه صنعتی امیرکبیر، تهران
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
Multi-mode Resource Constrained Project Selection and Scheduling Considering the Reinvestment Strategy in a Flexible Time Horizon
نویسندگان [English]
- S. Moomivand 1
- H. Davari-Ardakani 1
- H. Mosadegh 2
- M. Abouei Ardakan 1
In this paper, a multi-mode resource constrained project selection and scheduling problem is investigated considering the reinvestment strategy in a flexible time horizon. Among a set of available projects, a number of projects are selected and scheduled regarding the constraints on renewable resources and precedence relations. The benefits of project portfolio selection and scheduling are compared in both fixed and flexible time horizons. For this purpose, upper and lower tolerance limits are considered for the predetermined time horizon. If the schedule exceeds the time horizon, a penalty cost will be charged. The objective is to determine the optimal time horizon. A mixed-integer linear programming model is proposed for this problem, and solved by GAMS software/CPLEX solver and also a combination of a proposed heuristic algorithm, Genetic Algorithm, and a local search method. Numerical results show that the proposed approach has an acceptable performance in terms of the quality of the solution and the running time. Also, dealing with the problem in a flexible time horizon is more profitable compared to a fixed time horizon.
کلیدواژه‌ها [English]
- Multi-mode project selection and scheduling
- Resource constraints
- Flexible time horizon
- Reinvestment strategy
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