Data exchange between a mobile terminal and a control module of a car wash for feedback of evaluation signals

A system for modifying process data of a car wash based on captured evaluations of vehicle washes performed on the car wash, comprising: a set of mobile terminals, each adapted to perform an algorithmic evaluation process; and a control module, implemented on the car wash, for controlling and/or regulating the car wash based on the detected feedback signals encoding evaluations of vehicle washes performed on the car wash, and in data communication with the mobile terminals via the control interface.