23. A process for use in developing a dialog system, including: generating first function data, representing the respective probabilities that a phrase provided to said dialog system is predicted by grammars of said dialog system as a function of the number of example phrases used to generate said grammars; generating second function data, representing the probability that an in-grammar phrase provided to said dialog system is correctly recognized as a function of the number of example phrases used to generate said grammars; generating a third function on the basis of said first function and said second function, said third function representing the probability that a spoken phrase provided to said system is correctly recognized as a function of the number of examples used to generate said grammars.
26. A process as claimed in claim 23 , wherein said estimate represents the effort required to develop said spoken dialog system.