An analysis apparatus for carrying out an analysis for responses of a computer system including a plurality of servers, comprising: a unit that obtains data concerning a CPU utilization ratio of each of said plurality of servers from said computer system; a unit (1201, 1204) that obtains processing history data generated in said computer system, and generates data of a request frequency by users of said computer system; and an estimate unit (1208, 1210) that estimates an average delay time in each said server by using said CPU utilization ratio of each said server and said request frequency, and wherein said estimate unit comprises: a consumed CPU time estimate unit that estimates an average consumed CPU time per one request for each said server by carrying out a regression analysis using said CPU utilization ratio of each said server and said request frequency; wherein said consumed CPU time estimate unit calculates, as said average consumed CPU time per one request for each said server, the inclination of a regression straight line on a plane mapped by said CPU utilization ratio of each said server and said request frequency, and wherein said CPU utilization ratio of each said server and request frequency, which are used in said regression analysis, are values in a predesignated business time range; and a server delay time estimate unit that estimates an average delay time in each said server by using said average consumed CPU time per one request for each said server and said CPU utilization ratio of each said server. a unit that obtains data concerning a CPU utilization ratio of each of said plurality of servers from said computer system; a unit (1201, 1204) that obtains processing history data generated in said computer system, and generates data of a request frequency by users of said computer system; and an estimate unit (1208, 1210) that estimates an average delay time in each said server by using said CPU utilization ratio of each said server and said request frequency, and wherein said estimate unit comprises: a consumed CPU time estimate unit that estimates an average consumed CPU time per one request for each said server by carrying out a regression analysis using said CPU utilization ratio of each said server and said request frequency; wherein said consumed CPU time estimate unit calculates, as said average consumed CPU time per one request for each said server, the inclination of a regression straight line on a plane mapped by said CPU utilization ratio of each said server and said request frequency, and wherein said CPU utilization ratio of each said server and request frequency, which are used in said regression analysis, are values in a predesignated business time range; and a server delay time estimate unit that estimates an average delay time in each said server by using said average consumed CPU time per one request for each said server and said CPU utilization ratio of each said server. a consumed CPU time estimate unit that estimates an average consumed CPU time per one request for each said server by carrying out a regression analysis using said CPU utilization ratio of each said server and said request frequency; wherein said consumed CPU time estimate unit calculates, as said average consumed CPU time per one request for each said server, the inclination of a regression straight line on a plane mapped by said CPU utilization ratio of each said server and said request frequency, and wherein said CPU utilization ratio of each said server and request frequency, which are used in said regression analysis, are values in a predesignated business time range; and a server delay time estimate unit that estimates an average delay time in each said server by using said average consumed CPU time per one request for each said server and said CPU utilization ratio of each said server.