projects execution is an important way to implement organizational strategies, especially in the project-based organizations. in such organizations, the decision-makers usually encounter a problem of the project portfolio selection. of course, regarding the decision-makers’ risk attitude, they tend to direct organizational resources toward projects with low threats and high opportunities. this ...

In this study, we aim to present a new model for the resource-constrained project scheduling problem (RCPSP) considering a working calendar for project members and determined the skill factor of any member using the efficiency concept. For this purpose, the recyclable resources are staff resources where any person with multiple skills can meet the required skills of activities in a given time. ...

In today’s highly competitive marketplace, selecting an appropriate set of projects from a portfolio of candidate projects is vital for enterprises. An accurate selection of projects can steer a company to great success, while a careless selection may lead it to bankruptcy. Variability of project parameters such as benefit, cost, risk (failure probability), etc. during planning horizon makes th...

a r t i c l e i n f o As global competition intensifies, many national research institutes (NRIs) are investing substantial resources in research and development (R&D) to gain competitive advantage and develop the national economy. However, R&D investment involves a high degree of market and technological uncertainty. The literature on project portfolio selection focuses on either quantitative ...

In the science of operation research and decision theory, selection is the most important process. Selection is a process that studies multiple qualitative and quantitative criteria, related to the science of management, which are mostly incompatible with each other. The multi criteria selection of a renewable energy portfolio is one of the main issues considered in multi criteria literatur...

Based on the theory of existing research project portfolio management, paper analyzes key factors selection, and evaluates them using fuzzy comprehensive evaluation method. Finally, builds a choice integer programming model based 0/1 programming, which is organizations strategies.

extensive research has been devoted to resource constrained project scheduling problem. however, little attention has been paid to problems where a certain time penalty must be incurred if activity preemption is allowed. in this paper, we consider the project scheduling problem of minimizing the total cost subject to resource constraints, earliness-tardiness penalties and preemption penalties, ...

Motivated by an application in project portfolio analysis under uncertainty, we develop an algorithm S-VNS for solving stochastic combinatorial optimization (SCO) problems based on the Variable Neighborhood Search (VNS) metaheuristic, and show its theoretical soundness by a mathematical convergence result. S-VNS is the first generalpurpose algorithm for SCO problems using VNS. It combines a cla...