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原文2 An Index System for Quality Synthesis Evaluation of BtoC Business Website ABSTRACT It is important for successful electronic business to have a hi-quality business website. So we need an accurate and effective index system to evaluate and analyses the quality of the business website. In this paper, the evaluation index system following the ‘grey box’ principle is proposed which considers both efficiency of business website and performance of electronic business system. Using R-Hierarchical clustering method to extract the typical indexes from sub-indexes is theoretically proved to have a rationality and effectiveness. Finally, the evaluation method is briefly discussed. Categories and Subject Descriptors TP393.4 Keywords Business website; Evaluation system; R-Hierarchical clustering; System performance 1. INTRODUCTION Business website is an online media between buyer and seller. A hi-quality website is crucial to a company for a successful e-business. What is a hi-quality business website? In terms of maintaining the website, what do we focus on so that the quality meets the users’ needs? Apparently, using click-through rate to assess the popularity cannot objectively and accurately evaluate the quality of the business websites. Instead, we need to rely on scientific evaluation index system and methods. At present, there are many methods available for business website comparison or ranking, such as Usage Ranking, Purchase Comparison, Expert Opinion and Synthesis Evaluation etc. You can find both official authority and non-governmental organization that issue their power ranking. The former one is to monitor and regulate the market, such as CNNIC, which organized the competition for the Top Ten Websites in domestic. The latter one, such as Consumerreports (www.consumerreports. org), BizRate(), Forrester Research etc., is mainly to guide the web users’ activity. These kinds of comparison or ranking have special value in getting reputation and increasing