11 documents found, page 1 of 2
D3S: Decision support system for sectorization
Öztürk, E. G.; Rocha, P.; Rodrigues, A. M.; Ferreira, J. S.; Lopes, C.; Oliveira, C.; Nunes, A. C.Sectorization problems refer to dividing a large set, area, or network into smaller parts concerning one or more objectives. A decision support system (DSS) is a relevant tool for solving these problems, improving optimisation procedures, and finding feasible solutions more efficiently. This paper presents a new web-based Decision Support System for Sectorization (D3S). D3S is designed to solve sectorization pr...
Effectiveness of student teams: The role of team personality diversity
Mineiro, R.; Silva, M. G.; Nunes, A. C.In current educational landscapes, group work has emerged as a cornerstone of pedagogical strategies, offering students opportunities to cultivate essential skills for future professional endeavors. Central to the success of collaborative efforts lies the intricate interplay of team dynamics, with team personality diversity emerging as a significant factor influencing team effectiveness. Building upon existing ...
Developing a system for sectorization: An overview
Öztürk, E. L.; Sousa, F. S. de.; Lima, M. M.; Rocha, P. F.; Rodrigues, A. M.; Ferreira, J. S.; Nunes, A. C.; Lopes, I. C.; Oliveira, C. T.Sectorization is the partition of a set or region into smaller parts, taking into account certain objectives. Sectorization problems appear in real-life situations, such as school or health districting, logistic planning, maintenance operations or transportation. The diversity of applications, the complexity of the problems and the difficulty in finding good solutions warrant sectorization as a relevant researc...
A resectorization of fire brigades in the north of Portugal
Lima, M. M.; Sousa, F.; Öztürk, E. G.; Rocha, P. F.; Rodrigues, A. M.; Ferreira, J. S.; Nunes, A. C.; Lopes, I. C.; Oliveira, C. T.Sectorization consists of grouping the basic units of a large territory to deal with a complex problem involving different criteria. Resectorization rearranges a current sectorization avoiding substantial changes, given a set of conditions. The paper considers the case of the distribution of geographic areas of fire brigades in the north of Portugal so that they can protect and rescue the population surrounding...
Dynamic sectorization-conceptualization and application
Sousa, F. S. de.; Lima, M. M.; Öztürk, E. G.; Rocha, P. F.; Rodrigues, A. M.; Ferreira, J. S.; Nunes, A. C.; Oliveira, C.Sectorization is the division of a large area, territory or network into smaller parts considering one or more objectives. Dynamic sectorization deals with situations where it is convenient to discretize the time horizon in a certain number of periods. The decisions will not be isolated, and they will consider the past. The application areas are diverse and increasing due to uncertain times. This work proposes ...
An application of Preference-Inspired Co-Evolutionary Algorithm to sectorization
Öztürk, E.; Rocha, P.; Sousa, F.; Lima, M.; Rodrigues, A. M.; Ferreira, J. S.; Nunes, A. C.; Lopes, C.; Oliveira, C.Sectorization problems have significant challenges arising from the many objectives that must be optimised simultaneously. Several methods exist to deal with these many-objective optimisation problems, but each has its limitations. This paper analyses an application of Preference Inspired Co-Evolutionary Algorithms, with goal vectors (PICEA-g) to sectorization problems. The method is tested on instances of diff...
Improving fleet solution – a case study
Martins, A. L.; Nunes, A. C.; Pereira, R.; Ferreira, J. C.Transportation management is a logistical activity with a high impact on a company’s ability to compete in the market. Although the focus on cost reduction is the most usual concern with this activity, lead times and the quality of the service provided should also be considered depending on the market to be served. The goal of this research was to compare different fleet alternatives for a specific construction...
Analyzing a fleet solution using scenarios
Martins, A. L.; Nunes, A. C.; Carvalho, B.Transportation is one of the most important logistics activities, accounting for a significant part of the logistics costs and with high level of impact in terms of the service level provided to the customer. To counteract the upward trend in costs, it is fundamental to identify a transport strategy that can reduce costs and, at the same time, does not adversely affect the service levels agreed with customers. ...
Local search heuristics for sectoring routing in a household waste collection c...
Cortinhal, M. J.; Mourão, M. C.; Nunes, A. C.This paper addresses the problem of residential waste collection, as a real life application of a sectoring-arc routing problem (SARP). Tactical decisions comprise the partition of the service territory into a number of sectors so that each sector can be covered by a set of vehicle trips. In addition, operational decisions involving the design of the vehicle trips that minimize total routing time are to be made...
The mixed capacitated arc routing problem with non-overlapping routes
Constantino, M.; Gouveia, L.; Mourão, M. C.; Nunes, A. C.Real world applications for vehicle collection or delivery along streets usually lead to arc routing problems, with additional and complicating constraints. In this paper we focus on arc routing with an additional constraint to identify vehicle service routes with a limited number of shared nodes, i.e. vehicle service routes with a limited number of intersections. This constraint leads to solutions that are bet...