Completeness and Consistency Analysis of UML

This paper describes methods and tools for automatic safety analysis of UML statechart specifications. Two types of analysis are presented. The first one checks completeness and consistency based on the static structure of the specification, thus it does not requires the generation of the reachability graph. Accordingly, this method scales up well to large systems. The second one performs dynamic analysis by checking safety related reachability properties with the help of a model checker. It is restricted to core critical parts of the system. Two approaches of the implementation of the static checking are discussed. The use of the tools is presented by a case study.