Sharif Digital Repository

As an extension of known project scheduling problems which consider only time-independent costs, this problem includes both time- independent procurement costs and time-dependent renting costs for the resources. Consequently, in addition to projects where all resources are bought, we can deal with projects where resources are rented.
A resource Renting problem is a project-scheduling problem in which the availability levels of the rented resources are considered decision variables and the goal is to find a schedule and resource renting such that some objective function optimizes. In this thesis, we consider a resource renting problem in which the goal is to maximize the net present... 

Project scheduling is one of the branches in operations research and management sciences fields. Different goals have been considered in project scheduling, but financial goals are one of the most important criterions in this research area. The project with the conditions considered in this thesis is an NP-Hard problem and solving it in real size problems is only possible with heuristic or meta- heuristic methods. This research deals with the Project Procurement scheduling, considering warehouse space constraint. The purpose of this research is to minimize the total cost of this problem by determining the optimal activity start time and material ordering schedule subject to constraints. We... 

In this thesis a multi-mode resource constrained project scheduling problem with considering project robustness,length of critical path and total quality of project is solved. Also we tried to propose a new mathematical model for this problem and we used both renewable and non-renewable resource constrained.The function is multi-objective so we couldn’t use classic optimization methods to reach globally or locally optimum solutions,then we used a multi-criteria optimization method to solve the problem.with respect to the computational complexity of problem we proposed a multi-objective metaheuristic (DE) algorithm to get to dominated optimal solutions.in our metaheuristic method particular... 

In this project, we present a mathematical model for preemptive multi-mode resource-constrained project scheduling problem considering fast tracking (PMRCPSP-FT). The number of activity preemptions could be defined in the model. We used two types of resources in our model: Renewable resources and Non-renewable resources. Each activity can be accomplished in just one mode and each mode represents activity resource requirements, its duration and its maximum number of allowable preemptions. The objective is to minimize the project makespan. Considering the complexity of the problem, the exact solution is not achievable for big or real size problems. We use a genetic algorithm to solve the... 

The main goal of this thesis is to reduce the gap between the theoretical and actual project scheduling problems by introducing three problems and then proposing three different exact and meta-heuristic algorithms to solve them. These problems are as follows: the Resource-Constrained Project Scheduling Problem with Minimization of Total Weighted Resource Tardiness Penalty Costs (RCPSP-TWRTPC), the Resource-Constrained Project Scheduling Problem with Discounted Cash Flows of Weighted Earliness-Tardiness Costs (RCPSP-DCWET), and the Multi-Mode Resource-Constrained Project Scheduling Problem with Minimization of Total Weighted Resource Tardiness Penalty Costs (MRCPSP-TWRTPC). Also, we develop a... 

The project scheduling problem is one of the classic problems in project management that includes a range of optimization problems. One of the limitations we face in project scheduling problem is the resource constraint limitation. In many studies in the literature review, problems are based on the false assumption that a resource can be transferred between activities of a project or different projects without spending time and cost. The resource availability method in many fundamental researches in the context of resource constrained project scheduling problem (RCPSP) is considered as resource investment problems (RIP); while in many real world projects resources are rented for projects and... 

This project aims to study a situation in which several projects must be selected. The decision makers should select a subset of these projects taking into account the limitation of resources and scheduling. Project selection models generally do not consider schedule of project activities as part of selection process. On the other hand, except the cases where only one project is under process in each period, prioritizing the selected projects is not optimal not considering their scheduling. Projects scheduling in project activities level may increase the complexity of decision making for portfolio selection and expand the area of search for selection of projects portfolio. Therefore, all the...