Monitoring interviewer performance during data collection is essential for ensuring optimal performance at the interviewer level, thereby leading to improved data collection parameters in areas such as effort and efficiency. Paradata are widely utilized to enhance typical measures of performance, such as response rates, and provide a more nuanced view of interviewer performance characteristics. We describe a paradata tool developed to monitor interviewer performance in real time: the Interviewer Performance Profile (IPP). Daily data updates allow for ongoing monitoring to detect areas of performance concern as well as areas of improvement over time. Additionally, the flexible nature of the IPP …