![Origin 6.1 software Origin 6.1 software](https://i.ytimg.com/vi/Ye7XJ4Wf1gE/maxresdefault.jpg)
The description of the expected behavior of an automation can be represented by a GRAFCET of a certain “level”.
![Origin 6.1 software Origin 6.1 software](https://img.informer.com/screenshots/22/22670_3.png)
![Origin 6.1 software Origin 6.1 software](https://comatrasa.es/wp-content/uploads/2021/03/multivan-origin-6-1-150-cv-dsg-12-762x456.jpg)
Three main classes of modeling tools were thus identified:
The description of the expected behavior of an automation can be represented by a GRAFCET of a certain “level”.
Three main classes of modeling tools were thus identified: