Modeling is an integral part of many technical fields, including engineering, economics, and software engineering. In this context, a model is a formal representation of an organizational system, such as a business model or a formal description of software in UML. The SEQUAL framework For evaluating the quality of models, the semiotic quality framework (SEQUAL) developed by John Krogstie[LINK: http://www.palgrave-journals.com/ejis/journal/v15/n1/pdf/3000598a.pdf] [1], is introduced. The framework is grounded in semiotics, particularly the semiotic theory of Charles W. Morris. With a focus on the Quality Framework for modeling languages. Sets in the Quality Framework: · A: Actors that develop or have to relate to (parts of) the model. Can be persons or tools. · L: What can be expressed in the modeling language · M: What is expressed in the model · D: What can be expressed about