With the development of the Internet, people can communicate with each other much more easily. Consumers with similar needs can conduct a collective purchase with potential suppliers by the Internet. Currently, there are many web sites providing collective purchasing for consumers. However, these collective purchasing functions have not fully taken the advantages of the Internet for either consumers or suppliers.Therefore, the first purpose of this research is to explore the possible online collective purchasing models. Based on the number of suppliers and the number of products, six collective purchasing models and related algorithms have been proposed. Further, a comprehensive cybermediary system architecture for collective purchasing was described. Finally, a prototype is built to demonstrate how these collective purchasing models work.

This thesis is proposal of the business plan to expand business of the internet trade with underwear and for profit. The thesis is based on knowledge learned during studies, provided information, analysis of the current industry.

Made available in DSpace on 2016-04-29T14:23:16Z (GMT). No. of bitstreams: 1 Eduardo Bueno Bressane.pdf: 4015830 bytes, checksum: c2cd76f61b37282e8af6f8d15b8ac854 (MD5) Previous issue date: 2012-11-10 / Currently there are thousands of networks formats established through the Internet that are transforming and innovating each day the behavior in contemporary society. The study shows researches that indicate, by numbers, the high growth of the World Wide Web, both in number of users and the diversity of content, social networks and new forms of interaction in the space that became, as named by Levy, "Space of Knowledge". The Internet has become part of the peoples s routine tasks, like buying, selling, complaining about products or services, relating and entertaining. The purpose of this paper is to analyze the phenomenon of e-commerce and group purchases and relate them to the collective intelligence envisioned by Pierre Lévy. The paper presents cases of collective buying sites like Groupon and Peixe Urbano sites and customer support as Procon and Reclame Aqui, in order to understand how they interact and work through social networks like Facebook and Twitter and became stronger people and crowds in order to gain benefits and advantages in certain common situations of daily life. It also examines the behavior of companies facing the change of the consumer paradigm and transformation of e-commerce caused by social networks, trying to explore some of the new strategies adopted facing this new situation / Atualmente existem milhares de formatos de redes estabelecidas por meio da Internet que estão transformando e inovando dia a dia o comportamento da sociedade contemporânea. O estudo apresenta pesquisas que evidenciam, por meio de números, o alto crescimento da rede mundial de computadores, tanto na quantidade de usuários quanto na diversidade de conteúdos, redes sociais e novas formas de interação no espaço que se tornou, conforme denominado por Lévy, o Espaço do Saber . A Internet já faz parte das tarefas rotineiras das pessoas, como comprar, vender, reclamar de produtos ou serviços, relacionar e entreter. O objetivo deste trabalho é analisar o fenômeno do comércio eletrônico e compras coletivas e relacioná-los com a inteligência coletiva vislumbrada por Pierre Lévy. O trabalho apresenta casos de sites de compras coletivas como Groupon, Peixe Urbano e sites de apoio ao consumidor como o Procon e o Reclame Aqui, visando entender como estes interagem e atuam por meio das redes sociais como Facebook e Twitter e potencializam a reunião de pessoas e multidões a fim de adquirir benefícios e vantagens em determinadas situações corriqueiras da vida cotidiana. Analisa-se também o comportamento das empresas frente à mudança de paradigma dos consumidores e a transformação do comércio eletrônico ocasionados pelas redes sociais, buscando explorar algumas das novas estratégias adotadas diante desse novo cenário