1. A design rule management method implemented in a rule verification apparatus for checking a violation against a design rule which specifies a part shape when there is any change in parameters in a system, the rule verification apparatus comprising: a processing unit for processing information; an input unit for inputting information; and a storage unit for storing a first design rule, a second design rule and a relationship strength, indicating the strength of a predetermined relationship between the first and second design rules in association with one another, the method allowing the processing unit to perform steps comprising: acquiring the changed parameter via the input unit; and in a rule verification to determine whether or not there is any violation in the design rules that specify the part shape and that use the changed parameter, acquiring from the storage unit all the design rules having the relationship strength of a predetermined value, and performing the rule verification on all the acquired design rules.