MERODE is an Object Oriented Enterprise Modeling method developed at Kuleuven (Belgium). Its name is the abbreviation of Model driven, Existence dependency Relation, Object oriented DEvelopment.
A typical Merode analysis or conceptualisation consists of three views or diagrams: a so called existence dependency graph (EDG) simalary to a UML class diagram, a propriarity concept namely an object event table (OET) and a group of finite state machines.
More information on Merode

Merode-models can be created with the opensource case tool Mermaid
sourceforge website for Mermaid