Abstract: In order to provide a cost information management system and the like capable of performing cost estimation with a high level of accuracy without relying on a specialist skill, the cost information management system comprises: an input section that inputs functional parameters for respective circuits constituting the apparatus in the planning and design stages and a setting value of apparatus desired cost; a controller that calculates the apparatus cost in the planning stage based on the main functional parameters input by the input section, compares the calculated value with apparatus desired cost to determine whether to move to the design stage, additionally sets other functional parameters that have not been set in the planning stage in the case where it has been determined to move to the design stage so as to calculate the apparatus cost in the design stage, compares the calculated value with apparatus desired cost, and ends the apparatus development process in the case where the apparatus cost in the des

Abstract: A data management apparatus comprises a data registration section that registers data in a plurality of different databases storing data related to a common management target, and a data association section that associates first data registered in one of the plurality of databases with second data, the second data being registered in a database other than the database that stores the first data, being related to the same management target with the first data, and having a predetermined correspondence with the first data, wherein the predetermined correspondence is a relation in which one data is derived from the other data.