Aplicações do diagrama emergético triangular na tomada de decisão ecoeficiente
Applications of the emergetic ternary diagram for eco-efficient decision making
Giannetti, Biagio F.; Barrella, Flávio A.; Bonilla, Silvia H.; Almeida, Cecilia M. Villas Bôas de
http://dx.doi.org/10.1590/S0103-65132007000200003
Prod, vol.17, n2, p.246-262, 2007
Resumo
Diagramas ternários aliados à análise emergética são utilizados como ferramenta de suporte à tomada de decisão. A representação gráfica dos resultados da análise emergética possibilita comparar sistemas, produtos e serviços considerando os serviços provenientes do meio ambiente e da economia, avaliar melhorias e acompanhar o desempenho de um sistema produtivo. A ferramenta gráfica é versátil e pode ser aplicada para representar o desempenho de produtos, processos ou países, em um determinado período ou ao longo do tempo. Para ilustrar o uso dos diagramas emergéticos triangulares na tomada de decisão foi empregado um exemplo hipotético e quatro retirados da literatura. Mostra-se que as propriedades dos diagramas triangulares auxiliam na avaliação da ficiência dos sistemas e sua dependência dos recursos renováveis e não renováveis. Com o auxílio dos diagramas, as interações entre sistemas produtivos e as interações entre esses sistemas e o meio ambiente podem ser imediatamente verificadas e avaliadas.
Palavras-chave
Emergia, tomada de decisão, ferramenta gráfica, indicadores de sustentabilidade, diagramas ternários
Abstract
Emergetic ternary diagrams and emergy accounting are used as support tools for decision making. The graphical representation of emergy analysis permits to compare systems, products and services taking into account the environmental support, to evaluate improvements and to follow systems performance with time. The graphic tool is versatile and can ce applied to represent the performance of products, processes and even countries, within a given period or along the time. To illustrate the use of emergetic ternary diagrams to support decision making, examples taken from the literature were employed. It is shown that the diagram properties help evaluating systems efficiency, their dependence on renewable and non renewable resouces and on environmental services to absorb pollutants. With the aid of emergetic ternary diagrams, the interactions between systems and between these systems and the environment can be readly verified and evaluated.
Keywords
Emergy, decision making, graphic tool, sustainability indices, ternary diagrams
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