Dynamic Assignation of Roles and Tasks in Virtual Organizations of Agents

Nowadays, a common problem that affects the workflow and the results of an entity is the planning and distribution of tasks. Doing this manually implies anticipate workloads and employee characteristics, which is inefficient and almost uncalculated in high dynamic environments. In this paper, a model that generates a planning of tasks, minimizing the resources necessary for its accomplishment and obtains the maximum benefits is presented. Within this proposal, genetic algorithms, queuing theory, and CBR are used in different stages to obtain an efficient distribution. To test the system, the chosen case study that fits the scenario, is the e-Government where an elevated number of tasks must be solved in a precise term using the minimal resources

Supporting Virtual Enterprise Systems Using Agent Coordination

International audienceOpen environments like the Internet or corporate intranets enable a large number of interested enterprises to access, filter, process, and present information on an as-needed basis. These environments support modern applications, such as virtual enterprises and inter-organizational workflow management systems, which involve a number of heterogeneous resources, services, and processes. However, any execution of a virtual enterprise system would yield to disjoining and error-prone behavior without appropriate techniques to coordinate the various business processes. This paper reports on the design and implementation of a flexible agent-based framework for supporting the coordination of virtual enterprises and workflow management systems. The paper also shows how an agent coordination infrastructure, which is explained by social constraints, can impact on the engineering of highly dynamic virtual enterprises and workflow management systems by presenting a simple case study

Managing mechanisms for collaborative new-product development in the ceramic tile design chain

This paper focuses on improving the management of New-Product Development (NPD) processes within the particular context of a cluster of enterprises that cooperate through a network of intra- and inter-firm relations. Ceramic tile design chains have certain singularities that condition the NPD process, such as the lack of a strong hierarchy, fashion pressure or the existence of different origins for NPD projects. We have studied these particular circumstances in order to tailor Product Life-cycle Management (PLM) tools and some other management mechanisms to fit suitable sectoral reference models. Special emphasis will be placed on PLM templates for structuring and standardizing projects, and also on the roles involved in the process.This work was partially supported by the Spanish Ministerio de Ciencia y Tecnología; Dirección General de Investigación under the Plan Nacional de I+D+i programme for Research Promotion (Project DPI2002_02141. CE-TILE). We also acknowledge the help given by Capgemini España S.L.U., TAU Cerámica S.A., Esmalglass S.A., Macer S.A. and Cerámica Kersa S.L. in the new ceramic product design and development pilot experience, which was carried out within the framework of the project

Forms of organizing: What is new and why?

This paper aims to further our understanding of new forms of organizing by asking and answering two related questions: What is new in forms of organizing? and Why is it so? It starts by examining the main forces that lead to the emergence and diffusion of new organizational arrangements, distinguishing between objective and subjective factors and pointing out the interplay between the two. Elaborating on these two groups of factors, the paper introduces two dimensions ‹flexibility and openness‹ on which a contingency analysis of new forms of organizing and a classification are built. Flexibility is associated with the question «How fast does the organization as a whole have to learn?», while openness is intended to measure the need for knowledge integration and the location of relevant knowledge. Having outlined the main trends in the development of organizational arrangements, the paper looks at some of the implications. The use of information and communication technologies, knowledge management, changes in human resource practices and social contract, and changes in management roles and careers are all seen as consequences of a new quest for openness and flexibility. All these considerations lead to the conclusion that, nowadays, changes in organizational patterns are radical, calling for a paradigm change that will facilitate, in a holistic manner, the adjustments that are needed in order to build and manage these organizations. Like any paradigm change, this requires a change in the mindset of the agents involved, especially the decision-makers.new forms of organizing; new organizational arrangements;

Ceramic Tile Design: a Case Study of Collaborative New-Product Development in Fashion-Driven Chains

This paper studies ceramic tile design chains, as representative of those collaborative New-Product Development (NPD) processes where the presence of very different origins of designs and the fast changes of the market strongly condition the process. We have studied this particular circumstance by way of what we have called the “stimulators and stimuli framework” that proved helpful to obtain computer supported NPD models for ceramic tile clusters.This work was partially supported by the Spanish Ministerio de Ciencia y Tecnología; Dirección General de Investigación under the Plan Nacional de I+D+i programme for Research Promotion (Project DPI2002_02141. CE- TILE). We also acknowledge the help given by Capgemini España S.L.U., TAU Cerámica S.A., Esmalglass S.A., Macer S.A. and Cerámica Kersa S.L

Results of multi-agent system and ontology to manage ideas and represent knowledge in a challenge of creativity

This article is about an intelligent system to support ideas management as a result of a multi-agent system used in a distributed system with heterogeneous information as ideas and knowledge, after the results about an ontology to describe the meaning of these ideas. The intelligent system assists participants of the creativity workshop to manage their ideas and consequently proposing an ontology dedicated to ideas. During the creative workshop many creative activities and collaborative creative methods are used by roles immersed in this creativity workshop event where they share knowledge. The collaboration of these roles is physically distant, their interactions might be synchrony or asynchrony, and the information of the ideas are heterogeneous, so we can say that the process is distributed. Those ideas are writing in natural language by participants which have a role and the ideas are heterogeneous since some of them are described by schema, text or scenario of use. This paper presents first, our MAS and second our Ontology design

Model for WCET prediction, scheduling and task allocation for emergent agent-behaviours in real-time scenarios

[ES]Hasta el momento no se conocen modelos de tiempo real específicamente desarrollados para su uso en sistemas abiertos, como las Organizaciones Virtuales de Agentes (OVs). Convencionalmente, los modelos de tiempo real se aplican a sistemas cerrados donde todas las variables se conocen a priori. Esta tesis presenta nuevas contribuciones y la novedosa integración de agentes en tiempo real dentro de OVs. Hasta donde alcanza nuestro conocimiento, éste es el primer modelo específicamente diseñado para su aplicación en OVs con restricciones temporales estrictas. Esta tesis proporciona una nueva perspectiva que combina la apertura y dinamicidad necesarias en una OV con las restricciones de tiempo real. Ésto es una aspecto complicado ya que el primer paradigma no es estricto, como el propio término de sistema abierto indica, sin embargo, el segundo paradigma debe cumplir estrictas restricciones. En resumen, el modelo que se presenta permite definir las acciones que una OV debe llevar a cabo con un plazo concreto, considerando los cambios que pueden ocurrir durante la ejecución de un plan particular. Es una planificación de tiempo real en una OV. Otra de las principales contribuciones de esta tesis es un modelo para el cálculo del tiempo de ejecución en el peor caso (WCET). La propuesta es un modelo efectivo para calcular el peor escenario cuando un agente desea formar parte de una OV y para ello, debe incluir sus tareas o comportamientos dentro del sistema de tiempo real, es decir, se calcula el WCET de comportamientos emergentes en tiempo de ejecución. También se incluye una planificación local para cada nodo de ejecución basada en el algoritmo FPS y una distribución de tareas entre los nodos disponibles en el sistema. Para ambos modelos se usan modelos matemáticos y estadísticos avanzados para crear un mecanismo adaptable, robusto y eficiente para agentes inteligentes en OVs. El desconocimiento, pese al estudio realizado, de una plataforma para sistemas abiertos que soporte agentes con restricciones de tiempo real y los mecanismos necesarios para el control y la gestión de OVs, es la principal motivación para el desarrollo de la plataforma de agentes PANGEA+RT. PANGEA+RT es una innovadora plataforma multi-agente que proporciona soporte para la ejecución de agentes en ambientes de tiempo real. Finalmente, se presenta un caso de estudio donde robots heterogéneos colaboran para realizar tareas de vigilancia. El caso de estudio se ha desarrollado con la plataforma PANGEA+RT donde el modelo propuesto está integrado. Por tanto al final de la tesis, con este caso de estudio se obtienen los resultados y conclusiones que validan el modelo

Hybrid Cloud Model Checking Using the Interaction Layer of HARMS for Ambient Intelligent Systems

Soon, humans will be co-living and taking advantage of the help of multi-agent systems in a broader way than the present. Such systems will involve machines or devices of any variety, including robots. These kind of solutions will adapt to the special needs of each individual. However, to the concern of this research effort, systems like the ones mentioned above might encounter situations that will not be seen before execution time. It is understood that there are two possible outcomes that could materialize; either keep working without corrective measures, which could lead to an entirely different end or completely stop working. Both results should be avoided, specially in cases where the end user will depend on a high level guidance provided by the system, such as in ambient intelligence applications. This dissertation worked towards two specific goals. First, to assure that the system will always work, independently of which of the agents performs the different tasks needed to accomplish a bigger objective. Second, to provide initial steps towards autonomous survivable systems which can change their future actions in order to achieve the original final goals. Therefore, the use of the third layer of the HARMS model was proposed to insure the indistinguishability of the actors accomplishing each task and sub-task without regard of the intrinsic complexity of the activity. Additionally, a framework was proposed using model checking methodology during run-time for providing possible solutions to issues encountered in execution time, as a part of the survivability feature of the systems final goals

Collaboration requirements for project management information systems and its implications to project knowledge management

More and more organizations are changing their way of managing projects, switching from a traditional and controlled to a more flexible bottom-up paradigm, where collaboration and knowledge sharing between internal and external project members are critical factors. In addition, the role of technology is increasing in the context of project management due to greater challenges in today’s technology-enabled work environment, where technology tools are habitually used for collaboration, communication, and deployment of project management practices The purpose of this thesis is to identify and analyze current requirements of project management in project-based organizations regarding collaboration and knowledge management, as well as the impact of these requirements in use by practitioners on improving the management of projects. The research design and methodology were supported by main research questions. In order to collect the evidence to answer the questions a comparative case study approach was selected, which included several project-based organizations in Finland belonging mainly to the IT industry. In addition, the evolution and roadmap of a project management information system was presented and analyzed. The findings reveal the influence of collaboration and knowledge management to be incorporated in the management of projects through the use of socio-collaborative tools. An integrative project management framework combining these tools is presented.fi=Opinnäytetyö kokotekstinä PDF-muodossa.|en=Thesis fulltext in PDF format.|sv=Lärdomsprov tillgängligt som fulltext i PDF-format

A genetic approach for long term virtual organization distribution

Electronic versíon of an article published as International Journal on Artificial Intelligent Tools, Volume 20, issue 2, 2011. 10.1142/S0218213011000152. © World Scientific Publishing Company[EN] An agent-based Virtual Organization is a complex entity where dynamic collections of agents agree to share resources in order to accomplish a global goal or offer a complex service. An important problem for the performance of the Virtual Organization is the distribution of the agents across the computational resources. The final distribution should provide a good load balancing for the organization. In this article, a genetic algorithm is applied to calculate a proper distribution across hosts in an agent-based Virtual Organization. Additionally, an abstract multi-agent system architecture which provides infrastructure for Virtual Organization distribution is introduced. The developed genetic solution employs an elitist crossover operator where one of the children inherits the most promising genetic material from the parents with higher probability. In order to validate the genetic proposal, the designed genetic algorithm has been successfully compared to several heuristics in different scenarios. © 2011 World Scientific Publishing Company.This work is supported by TIN2008-04446, TIN2009-13839-C03-01, CSD2007-00022 and FPU grant AP2008-00600 of the Spanish government, and PROMETEO 2008/051 of the Generalitat Valenciana.Sánchez Anguix, V.; Valero Cubas, S.; García Fornes, AM. (2011). A genetic approach for long term virtual organization distribution. International Journal on Artificial Intelligence Tools. 20(2):271-295. https://doi.org/10.1142/S0218213011000152S27129520