"Field trials" refer to a type of testing or experiment that takes place outside of a controlled environment, usually in real-life conditions, to see how well something works or performs in a practical setting. Full definition
However, cases have also been described in field trial dogs. (essfta.org)
Though only one year of data is available for analysis at this point, the study has involved a randomized field trial of over 400 teachers and administrators broken into test and control groups. (insightadvance.com)
The researchers conducted a randomized field trial of software that organizes first grade reading instruction. (educationnext.org)