CATI, which stands for Computer-Assisted Telephone Interviewing, is a data collection methodology in which trained interviewers conduct structured or semi-structured interviews by telephone, guided by software that displays questions, enforces skip logic, and records responses simultaneously. Widely used in market research, public opinion polling, and consumer insights programs, CATI enables researchers to reach geographically dispersed respondents at scale while maintaining a degree of conversational depth that self-completion surveys cannot replicate. Within qualitative research, CATI has historically served as a bridge between fully structured surveys and open-ended exploratory interviews, allowing probing follow-up questions within a controlled framework. However, its reliance on telephone infrastructure, trained interviewer availability, and manual scheduling creates operational constraints that limit research speed and continuous deployment.