On behalf of the organizing committee, it is our pleasure to welcome you to the six edition ofthe International Conference: Information Systems and Economic Intelligence (SIIE). Theconference in Hammamet (Tunisia) has been co-organized by researchers from theUniversity of Manouba (Tunisia), from University of Lorraine (France). It is sponsored by theMinistry of Higher Education of the Republic of Tunisia, ISKO-Maghreb Chapter and IEEEsectionTunisia.The central topic of this conference is competitive intelligence (CI) and extended to businessintelligence. Business Intelligence (BI) has been defined by I.E. Harold Wilensky in 1967 asthe activities of production of knowledge for economic and strategic goals of an organization,collected and produced in a legal context.To set up an economic strategy, one needs to have a maximum of relevant information. Therole of BI is to provide relevant and oriented information to the decision-makers. Thisinformation is an essential source for making the right decision to guarantee the durability ofan organization. Several powerful computer tools are available to collect the necessarysignificant information.Business Intelligence is based on data processing collected from various cross economicsources. The competitive market makes the acquisition of knowledge necessary. However, toget information is not sufficient, one has to be able to exploit it and to transform it intoknowledge.Based on these findings, enterprises, industries, universities and states have invested in thisnew discipline that plays an essential role in the performance and competitiveness. Therelationship between value-added information, knowledge and decision is more than everasked.Competitive intelligence is both a field of theoretical research and practice process, whichrequires a multidisciplinary approach. Moreover, the actors of this area are of different fields:scientific, R&D, manager, financial, etc. They all participate to retrieve relevant data, strongand weak signals, added-value information and processing into knowledge and thendecision-making units.SIIE Conference since its first edition in 2008 provides to scientific and economic partners aspace of exchanging. SIIE’2015 will offer five keynotes, one per half-day, related to themultidisciplinary topic of BI, they will be presented by world-class experts. It will proposealso twenty-seven regular papers and two thematic symposium: one on "StructuringMultimedia Streams" and one as "Doctoral Symposium" with fifteen posters of PHDcandidates.We would like to thank the Scientific Committee members and reviewers who have permittedto set up a scientific program of quality. Also, we would like to thank the OrganizingCommittee members for making SIIE’2015 an enjoyable and memorable meeting. Ourgratitude goes finally to the authors of papers that have made these days of Hammametvery attractive.

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