Book excerpt: The present Conference is the 4th of similar conferences with the same subject, which are organised of the Department of Business Administration. The Technological Educational Institution of Athens, is a Tertiary Educational Institution of Excellence with an impressive record in teaching and research and is sponsoring the present Conference. The purpose of our Conference is to present and publish the research output of, not only TEI of Athens, but all the Universities and Technological Institutions of Greece and the different Nations of the World. Another important purpose is to facilitate the interaction between two worlds: the world of Business and the world of Academic Community. The organizers of this Conference have the ambition to establish a forum for discussions on the theory and applications of the Quantitative and Qualitative Methods in the different business sectors such as Small to Medium Enterprises or large Companies in Industry, Commerce, Tourism, Health, Public Sector, Shipping Industry and financial services. The Conference has a Scientific Committee and all the papers have been examined by two anonymous referees. Selected papers will be published in internationally recognized journals. The Proceedings of the Conference have ISBN, ISSN numbers and they will appear, after the Conference in Google.