9. The computer-readable medium according to claim 1 , further causing the computer to function as a disturbance analyzing unit to calculate how much the disturbances have influenced productivity of the agent, by using the response records distinguished as the disturbance information or the common information by the disturbance distinguishing unit.
9. The computer-readable medium according to claim 1 , further causing the computer to function as a disturbance analyzing unit to calculate how much the disturbances have influenced productivity of the agent, by using the response records distinguished as the disturbance information or the common information by the disturbance distinguishing unit. 10. The computer-readable medium according to claim 9 , wherein: the disturbance analyzing unit calculates the influence of the disturbances, based on a relative productivity influenced by the disturbance in a first half of the predetermined period, a relative productivity influenced by the disturbances in a second half of the predetermined period, a ratio of common response records to a whole of the response records in the first half of the predetermined period, and a ratio of common response records to the whole response records in the second half of the predetermined period.