| 摘要 |
In a stagnation-judgment device, a work history-acquiring unit acquires work history of actions taken by an operator to handle an enquiry. A correlation-deriving unit derives correlation between actions of the operator and stagnation based on the work history regarding past enquiries. A stagnation-judgment unit judges whether the operator is in a state of stagnation by checking the work history regarding a current enquiry and the correlation derived by the correlation-deriving unit. A warning unit issues a warning when the operator is in the state of stagnation.
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