Dialog management in interactive systems: a comparative survey
Stefan Britts · ACM SIGCHI Bulletin · 1987
Developing interactive systems is very expensive. This stems from the fact that, in average, 50--60 per cent of the lines of code in an application are for dialog management [Sutto77]. Therefore, dialog development has been recognized as an important area both among researchers and practitioneers. As a result, many tools have been developed, or are under development, with the aim of reducing the dialog design and implementation efforts, and hence, reducing the costs.