IBM Statemate

IBM Statemate is a modeling environment for designing and verifying the behavior of systems that continuously respond to external events, such as sensor signals or user inputs (reactive systems). It relies on statechart and activity chart notation to model concurrent, hierarchical, and event-driven behavior in a compact and readable form.

Engineers use Statemate to stimulate execution and validate behavioral logic before writing code, reducing the cost of late-stage design errors. Originally developed by iLogix and acquired by IBM in 20026, it has been adopted in aerospace, automotive, and medical device development. The tool generates executable models, allowing teams to test system behavior early in the development cycle. 

Organizations running Statemate models today often migrate to IBM Rhapsody to access modern MBSE and code generation capabilities.