The International Society for Performance Improvement sponsored a practice analysis for human performance technologists in 2012. This was done to validate and update the Certified Performance Technologist Standards. This article describes the qualitative research methods used in this mixed methods study. The researchers chose to use interviews and focus groups to identify best practices in the performance improvement field. Certified Performance Technologists conducted the interviews and focus groups. The result of the study is a comprehensive description of the work of human performance technologists.