30. A system for developing a dialog system, comprising a computer system configured with: a grammatical inference engine for generating grammars for said dialog system on the basis of respective sets of example input phrases for said dialog system, said sets including different numbers of example input phrases; a learning curve estimator for determining, on the basis of said grammars, a relationship between a number of example input phrases and an estimated probability that an input phrase is correctly recognized; and an estimator for generating an estimate of the number of example input phrases required to achieve a predetermined speech recognition accuracy when using said dialog system to allow a developer of said dialog system to determine development of said dialog system.
30. A system for developing a dialog system, comprising a computer system configured with: a grammatical inference engine for generating grammars for said dialog system on the basis of respective sets of example input phrases for said dialog system, said sets including different numbers of example input phrases; a learning curve estimator for determining, on the basis of said grammars, a relationship between a number of example input phrases and an estimated probability that an input phrase is correctly recognized; and an estimator for generating an estimate of the number of example input phrases required to achieve a predetermined speech recognition accuracy when using said dialog system to allow a developer of said dialog system to determine development of said dialog system. 31. A system as claimed in claim 30 , including a simulator for generating prompts for said dialog system and for receiving example input phrases in response to said prompts.