Enterprise competitiveness in the information age is very much dependent on the quality of the underlying information systems. These provide crucial support to as important tasks as strategic business planning and decision support. Information system quality is, in turn, highly dependent upon consistency and reliability of stored data. However,

Switching between electronic and traditional markets, consumers nowadays impact profoundly on market makers. To successful conduct business, firms have to carefully making channel decisions to meet the needs of customers. The purpose of this article is to offer normative models for analyzing consumer channel selection behaviors between traditional and electronic markets. Referred to transaction cost economics and consumer decision processes, the models assumed that customers would like to purchase on the market that brings them the highest utility values in terms of effort, waiting time, and cost savings. Equilibrium solutions at which customers are indifferent in choosing between electronic and traditional channels are also derived for both risk-neutral and risk-averse consumers.

this report, the development of bmt line, a Web-based medical information service is described that directly addresses the scenario presented above. bmt line provides a reference database for Web and Internet resources in the domain of bone marrow transplant and leukemia. The added value of bmt line is based on the provider controlled content of the information it references, the high degree of semantic integration of referenced material which is based on a complex semantic model, the support of different standard user classes, and the support of individual customization of the service through the application of single users' profiles.