Underlying system, called the spoken dialogue system, a speech recognition, speech understanding, dialog management and speech generation. They allow interaction that speaks more-or-less naturally with human users, which still differs from a regular phone conversation. This book gives a systematic assessment, evaluation, and methods of prediction quality innovative services. This taxonomy serves as a tool to classify the methods of assessment and evaluation, for planning and interpreting experimental evaluation, and to assess quality based on the characteristics of the system. While the system behavior can be measured in a parametric, user perceptions can only be measured through the interaction experiments with human test subjects. It helps to make assessment and evaluation of experiments in an efficient manner, and to establish systems that offer high quality to their users. Although written from the perspective of an engineer in the telecommunications sector, the book is a valuable source of information for broad audiences, from experts in signal processing and telecommunications, acoustic communication, computational linguistics, speech and language sciences, to psychophysics, human factors and ergonomics design.