System and method for appraising resource configuration

A system for appraising a resource configuration of second resources to be built by migrating first resources existing in a first computer system which is the source of migration to a second computer system which is the destination of migration, the system comprising:

• a source's load model estimating unit that estimates a source's load model representing a load of the first resources;
• a destination's load model estimation unit that estimates a destination's load model representing a load of the second resources based on the source's load model;
• and
• a destination-related configuration designing unit that compares performance requirements of the first resources against the destination's load model estimated by the destination's load model estimation unit, finds the destination's load model that is conformable to the performance requirements, and determines design values of the resource configuration based on the destination's load model found to be conformable.
• wherein the destination-related configuration designing unit corrects the design values of the resource configuration based on the destination's load model conformable to the performance requirements to decrease design margins of the resource configuration using a design correction value defined to meet a service level requested.