Revising the DEMO method: modelling wait links

The DEMO method and modelling language for enterprises has evolved over the past 30 years. Extensive work has been done to specify the modelling language to create DEMO based modelling tools and code generators. However, many issues have been identified regarding the adoption, readability, and completeness of DEMO specification.In this paper, we focus on the Process Model that has several issues regarding its relation with the Action Model and wait links. The proposed solution encompasses adjusting the visualisation of the fact kinds in the Process Model so that they can directly be linked to the event part of the Action Rules Specifications in the Action Model. Some other suggestions for improving the comprehensibility of the Process Model and the impact on DEMO are included. The proposed solution is illustrated with three cases and evaluated against the expected benefits. Preliminary results show an improved readability and easier creation of the Action Model that comply with the Process Model. More research is needed to validate the proposed solution with experts and to solve other issues regarding DEMO.