A feedback system is a way for people to give their thoughts or opinions on something, so that those in charge can make improvements or changes based on that feedback. Full definition
Do you have any other examples of this type of feedback system in nature? (illconsidered.blogspot.ru)
Developed and implemented new feedback system for users concerns, bugs, and defect tracking regarding use and functionality of new interfaces. (thebalance.com)
For everyone to reap the rewards, however, you must ensure that there is a solid and consistent constructive feedback system in place. (elearningindustry.com)