نتایج جستجو برای: p mrcpsp

تعداد نتایج: 1269733  

در این پژوهش مدل ریاضی جهت زمانبندی پروژه­هایی با محدودیت منابع در حالت چند مد و با هدف بیشینه سازیNPV  ارائه شده است. مدل ارائه شده برگرفته از مسئله  MRCPSP- GPRمی­باشد. در این پژوهش ابتدا یک مدل ریاضی که قادر به ارائه جواب دقیق باشد جهت حل نمودن مسائل  MRCPSP- GPRارائه خواهد شد، سپس مدل برای محاسبه هزینه اضافه کاری، در نظر گرفتن جریمه دیرکرد، پاداش زودکرد و تاثیر آن برروی NPVپروژه تعمیم می­یا...

Journal: :Applied sciences 2022

In this paper, we investigate the characterization of MRCPSP/max under uncertainty conditions and emphasize managerial ability to recognize handle positively disruptive events. This proposition is then demonstrated using entropy approach find events response time intervals. The problem solved a resilient characteristic three-stage procedure gauged by schedule robustness adaptivity; resulting ab...

Resource constrained project scheduling problem is one of the most important issues in project planning and management. The objective function of this problem is to minimize the completion time of a project. When there is budget constraint or high risk for investment, using the criteria such as cash flows is so important. The development of computer systems and processors makes it possible to t...

2009
M. Seifi R. Tavakkoli-Moghaddam F. Jolai

This paper presents a multi-mode resource-constrained project scheduling problem (MRCPSP) with maximizing the net present value (NPV) form the project contractor’s point of view. Positive and negative cash flows are considered in this model. Furthermore, to make the model close to the real situations, four different models for positive cash flows are considered. Two meta-heuristics, called simu...

2014
Omar S. Soliman

: This paper proposes a novel niching estimation of distribution algorithm (EDA) based on fuzzy c-means (FCM) clustering for solving the multi-mode resource-constrained project scheduling problem (MRCPSP). FCM clustering is employed to partition the population into niches to avoid premature convergence of the EDA. Then, the niche capacity is determined by Boltzmann scheme according to the adapt...

2011
F. S. Kazemi

This paper presents a multi-objective multi-mode resource-constrained project scheduling problem (MRCPSP) with positive and negative cash flows. We consider the objectives of the net present value (NPV) maximization and robustness maximization along by makespan minimization. Furthermore, to make a model close to the real world situations, two types of commonly used payment models are considered...

2012
A. Csébfalvi

This paper presents an experimental investigation of the Sounds of Silence (SoS) harmony search metaheuristic for the multi-mode resource-constrained project scheduling problem (MRCPSP) using a pre-optimized starting repertoire. The presented algorithm is based on the time oriented version of the SoS harmony search metaheuristic developed by Csébfalvi et al. [1] for the single-mode resource-con...

2017
Miquel Bofill Jordi Coll Josep Suy Mateu Villaret

Pseudo-Boolean (PB) constraints are usually encoded into Boolean clauses using compact Binary Decision Diagram (BDD) representations. Although these constraints appear in many problems, they are particularly useful for representing resource constraints in scheduling problems. Sometimes, the Boolean variables in the PB constraints have implicit at-most-one relations. In this work we introduce a ...

Journal: :journal of optimization in industrial engineering 2012
behrouz afshar nadjafi amir rahimi hamid karimi

in this paper we consider the non-preemptive variant of a multi-mode resource constrained project scheduling problem (mrcpsp) with mode identity, in which a set of project activities is partitioned into disjoint subsets while all activities forming one subset have to be processed in the same mode. we present a depth-first branch and bound algorithm for the resource constrained project schedulin...

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