_____________________________________________________________________________________________________ 1 Department of Business Administration, University of Patras, 26504 Rio Achaia, Greece. 2 Department of Surveying, National Technical University of Athens, 9 Iroon, Polytechneiou, Zografos 157 80, Greece. *Corresponding author: E-mail: vagenaakr@gmail.com; Chapter 1 Print ISBN: 978-93-91215-07-1, eBook ISBN: 978-93-91215-15-6 Group Analysis of Official Hotel Classification Systems: A Recent Study Akrivi Vagena 1* and Gerassimos Manoussakis 2 DOI: 10.9734/bpi/castr/v4/2173F ABSTRACT The present research investigates the official classification systems in order to find common, important sectors and criteria. Some criteria indicate the perception of certifying organizations, of countries that apply them, and of the hotel industry, as to what is important for a hotel to offer. Official classification systems state their basic principles, which differ from one system to another and not all are met at the same time. Most countries give three reasons for entering a formal rating system: consumer protection, tourism planning and marketing. The study will present the practices applied in the hotel industry, through compliance with official classification systems. It will contribute to the existing knowledge of hoteliers, institutions and organizations that create hotel certification systems, and in general to the knowledge of the tourism industry. Hotel classification systems are tools for maintaining the high quality of hotel industry. Also, τhe classification of hotels presents heterogeneity. Common points are the range of ranking categories and the marks used, but if the requirements of the criteria of each category are analyzed, very different conditions are discovered, sometimes even within the same country. Nevertheless, the introduction of a classification system for hotels is a complex matter due to the diversity of classification systems, accommodation types and the cultural, environmental and economic context in which the systems operate each time in individual countries. This study results, in a proposed model hotel classification system, which will directly contribute to reducing the risk of not meeting customers' expectations and providing hotel services more efficiently, depending on the type and category of accommodation. Effective management of customer expectations is crucial to ensuring the viability of the tourism business. The survey data were drawn from the analytical recording and processing of 39 classification systems, applied in different countries and continents. Keywords: Hotel classification systems-hotel rating; star rating; rating criteria; hospitality industry. 1. INTRODUCTION Among the advantages hoteliers expect from classification are increased prices and profit margins [1]. Providing information to customers about the hotel category acts as a marketing tool in a highly competitive market environment, where differentiation from competitors can be a matter of survival. To illustrate the importance of classification systems, Israeli [2] points out that, despite the Israeli Ministry of Tourism abandoned the national star rating system in 1995,due to the inspection and enforcement costs found to be too high, hotels continued to use and advertise the rating in stars previously awarded to them. According to Israeli [2], the star category can be seen as an asset that creates a significant boost for growth in sales and prices. Such an upgrade, linked to entry into an official classification system, is often mentioned in the literature of tourism management [3]. However, in countries where the official hotel classification system is voluntary, a significant part of hotels choose not to enter the system. InFrance, there are 25% unclassified hotels [4], whereas in the