1,721,621 research outputs found
Risks prioritization in decision making for wind energy investments using analytic network process (ANP)
No full textThe wind energy production grew up in the last years rapidly. In fact, the project management of these kind of initiatives has found, only recently, some practical references about the time, cost and quality management, stating some reference values (Fera, Macchiaroli, and Miranda, Project management for small wind turbines: An experimental survey on activities, lead times and risks, 2011) (Fera, Iannone, Macchiarli, and Miranda, 2012) (Fera, Iannone, Macchiaroli, Miranda, and Schiraldi, Project appraisal for small and medium size wind energy installation: the Italian energy policy effects, 2014). In these years a research question arose about the risks classification and prioritization of the different phases of wind energy initiatives. Aim of this paper is to present a classification and a prioritization of the risks during a project of installation for a wind energy initiative using the ANP
Assessment Model of Tariff Structure for Sustainable Management of Water Resources Systems
No full textThe paper presents an assessment model for the tariff structure aimed at achieving sustainable management of water resources systems. In the face of increasing water scarcity and environmental challenges, a clear, effective, and equitable tariff structure is essential. The proposed model integrates the regulatory framework with financial and environmental principles like full cost recovery and polluters pay. The objective is to propose a tariff system that not only ensures financial sustainability for water service providers but also promotes responsible water use by users
Modelling and Optimization of the Assembly Process in a Flexible Cell for Aircraft Panel Manufacturing
No full textIn this paper we consider a manufacturing problem arising in a robotic cell for aircraft panels assembly. An initial technological analysis has shown that some mechanical assembly phases, which involve a huge amount of riveting and screwing operations, can be automated. The motivation of this research is to find the most profitable sequencing of the operations from the viewpoint of throughput time. In particular, we focus on the set-up activities related to switching between operations. The problem is to find the permutation of operations such that the overall switching time is a minimum. In the situation on hand, major precedence constraints among the operations hold. The problem is formulated as an instance of the well-known `sequential ordering problem’, for which we propose a tabu search solution heuristic. In this paper we report on both the modelling process and the solution procedures
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