Abstract: The method and system include the following steps: storing in advance a logical relation between sets of business information used for a task in the business process, receiving a revision of the business process, extracting a difference between pre-revision business process information and post-revision business process information based on the pre-stored business process information, storing the difference information as revision history information of the business process to be revised, analyzing a processing category as a processing type of the business information of a pair of task and business information as constituent elements of the post-revision business process, storing the information in a storage device, extracting influenced business processes from the business process information based on an XOR relation between the sets of business information or an XOR relation of the series of tasks, receiving a selection of a business process among the influenced business processes, and displaying the result

Abstract: With an object of improving system maintainability, a system which evaluates a maintenance man-hour cost of a component quantitatively is provided, and consequently when a system designer designs a component which is a unit of a subsystem obtained by putting a function of a business application and data together, it is made possible to design the component with a minimum maintenance man-hour cost by extracting a maintenance pattern obtained by patterning an influence extension place, an amendment man-hour cost, and the like at time of maintenance on the basis of maintenance history information and evaluating a maintenance man-hour cost of the component according to the maintenance pattern.