1. A method of automated training for a router confidence engine in a call routing system, the method comprising: defining, by a computer system, a set of call routes for processing input speech utterances in a call routing system, each call route representing a specific call processing path; performing, by the computer system, initial router confidence training based on an initial set of training data; operating, by the computer system, the call routing system to assign input speech utterances to the defined call routes; collecting, by the computer system, adaptation training data based on processed input speech utterances; and re-performing, by the computer system, router confidence training based on the adaptation training data, wherein each iteration i of the re-performing occurs when 2 i speech utterances for each call route are available.
1. A method of automated training for a router confidence engine in a call routing system, the method comprising: defining, by a computer system, a set of call routes for processing input speech utterances in a call routing system, each call route representing a specific call processing path; performing, by the computer system, initial router confidence training based on an initial set of training data; operating, by the computer system, the call routing system to assign input speech utterances to the defined call routes; collecting, by the computer system, adaptation training data based on processed input speech utterances; and re-performing, by the computer system, router confidence training based on the adaptation training data, wherein each iteration i of the re-performing occurs when 2 i speech utterances for each call route are available. 2. The method according to claim 1 , wherein performing the initial router confidence training comprises: performing the initial router confidence training based on acoustic features and natural language understanding (NLU) features to represent the likelihood of the input speech utterances being correctly classified with the defined call route.