The tuning phase covers all post-deployment activities. This includes adjustments to the application based on surveys, call log analysis, end-to-end call monitoring, and A/B testing. Application adjustments of interest to VUI designers include changes to the call flow, grammars, and the prompts and messages (Guinn, 2010).

Surveys See Surveys.

Call log analysis See Monitoring Production Data.

End-to-end call monitoring See Call Recordings.

A-B testing See A-B Testing.

Guinn, I. (2010). You can’t think of everything: The importance of tuning speech applications. In W. Meisel (Ed.), Speech in the user interface: Lessons from experience (pp. 89–92). Victoria, Canada: TMA Associates.