A configuration management apparatus that manages, on the basis of data having configuration items and attribute information defining the configuration items, information about the resources includes: an operation execution unit that acquires a processing request that at least includes attribute information and processing information; a processing execution unit that determines for which configuration item the processing request is made and links the configuration item and the processing request; and a delay calculation determination unit, a calculation execution unit and a delay calculation plan unit that perform a process of processing information inside the processing request for the configuration item on the basis of the linking by the processing execution unit at a different timing from a timing when the processing request is acquired by the operation execution unit to get attribute information inside the processing request reflected in the configuration item.