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Publicações

Publicações por CESE

2002

An order planning system to support networked supply chains

Autores
Azevedo, A; Toscano, U; Sousa, JP;

Publicação
COLLABORATIVE BUSINESS ECOSYSTEMS AND VIRTUAL ENTERPRISES

Abstract
In this paper we present an information system architecture, addressing the needs of an advanced order planning system for industrial networked enterprises environments. Firstly, the general objectives of the system are described focusing on the relevant business processes identified. Then, the related general functionality (business solutions) of a distributed system supporting those processes is described, focusing on the particular case of order change acceptance. An agent based architecture supporting this business solution is outlined, emphasizing the agent framework and the legacy systems integration.

2002

A 2-exchange heuristic for nesting problems

Autores
Gomes, AM; Oliveira, JF;

Publicação
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH

Abstract
This paper describes a new heuristic for the nesting problem based on a 2-exchange neighbourhood generation strategy. This mechanism guides the search through the solution space consisting of the sequences of pieces and relies on a low-level placement heuristic to actually convert one sequence in a feasible layout. The placement heuristic is based on a bottom-left greedy procedure with the ability to fill holes in the middle of the layout at a later stage. Several variants of the 2-exchange nesting heuristic were implemented and tested with different initial solution ranking criteria, different strategies for selecting the next solution, and different neighbourhood sizes. The computational experiments were based on data sets published in the literature. In most of the cases, the 2-exchange nesting algorithm generated better solutions than the best known solutions.

2002

A tool to support the shared understanding of manufacturing systems organization in innovation processes

Autores
Soares, AL;

Publicação
INTERNATIONAL JOURNAL OF COMPUTER INTEGRATED MANUFACTURING

Abstract
A concept and tool to support the technical and organizational development activities in agile, integrated enterprises are described. The drawbacks of conventional simulation model construction are discussed and the requirements for a collaborative tool based on simulation and conceptual modelling are described. The theoretical foundations of this tool are explained, focusing on a technical and organizational ontology. The features of the resulting system concerning conceptual modelling are presented together with the criteria to evaluate alternative scenarios based on the socio-technical premises. Finally, a practical application of the prototype tool is described, showing the usefulness of such a system in industrial innovation processes.

2002

Experiences in the development of information systems in an industrial innovation context

Autores
Soares, AL; Gaida, W; Schmidt, C;

Publicação
ENTERPRISE INFORMATION SYSTEMS III

Abstract
This paper describes the methods and experiences of developing of an information system in an industrial innovation context. The case analysed respects to a system supporting quality management tasks of working teams in industrial companies, developed within a research & development EU funded project. The initial concept of the system is described first, followed by the way how requirements where elicited and structured and the system specified. Next, design and prototyping are analysed, detailing die end-users evaluation approach. Conclusions are drawn on the opportunities and difficulties od R&D involving industrial enterprises.

2002

Using near field model predictions to detect and map an outfall sewage plume with an AUV

Autores
Ramos, P; Neves, MV; Pereira, FL;

Publicação
OCEANS 2002 MTS/IEEE CONFERENCE & EXHIBITION, VOLS 1-4, CONFERENCE PROCEEDINGS

Abstract
Near field model predictions can be used to reduce the uncertainty about outfall sewage plume location during a monitoring mission. In this paper we present an innovative methodology that uses these models to predict the plume location, establishing a sensing strategy applicable to a monitoring mission using an AUV. The paper describes two applications that implement this methodology, accomplishing the automatic mission definition using real-time oceanographic data.

2002

Brokerage function in agile virtual enterprise integration - A literature review

Autores
Avila, P; Putnik, GD; Cunha, MM;

Publicação
COLLABORATIVE BUSINESS ECOSYSTEMS AND VIRTUAL ENTERPRISES

Abstract
The paper present a review of the brokerage function as it is defined within different Agile and/or Virtual Enterprise (A/V E) models throughout the literature, including the broker's function within the Broker function taxonomy, BM_Virtual Enterprise Architecture Reference Model, as well as their comparison. Many authors see a broker, and the corresponded brokerage function, as one of the principal agents, or a mechanism, for agility as well as for reconfigurability of the A/V E organization structure (by some authors the reconfigurability is the basic function of agility). However, the function of the broker, and its position in the AN E organizational structure, has been defined in different models ranging from entrepreneurship function, resource selection function, through scheduling function etc. The analysis shows that there is a great heterogeneity of the broker functions, or definitions.

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