A terminal includes a sensor for detecting a physical quantity and a data transmitting unit for transmitting data representing the physical quantity to a processing device. An input/output device includes an input unit for receiving an input of data representing a productivity relating to the person wearing the terminal and a data transmitting unit for transmitting the data representing the productivity to the processing device. The processing device includes a feature value extracting unit for extracting a feature value from the data representing the physical quantity, a conflict calculating unit for determining items of data bringing about conflict from the data representing the productivity, and a coefficient-of-influence calculating unit for calculating a degree of the correlation between the feature value and the items of the data bringing about conflict.