The main goal of this workshop is to offer a platform for scientists who are interested in the design, development and use of interactive systems involving multiple stakeholders with different viewpoints integrated before, during or after the development of the interactive system. More precisely, the first objective is to identify and gather information about knowledge and practice in the workshop’s domain:

• Get an overview of current practices in multi-stakeholder R&D practices (methods/notations/tools) to engineer usable interactive systems as well as lessons learned and recommendations;
• Identify a systematic approach for describing multiple stakeholders’ viewpoints and assessing their impact on properties such as users’ UX and systems’ usability;
• Understand how multiple stakeholder identify properties to describe them and to assess their relative importance (going beyond the classical UX and usability but also address performance, dependability, safety, ...);
• Understand how multiple stakeholders reach agreements and trace design decisions and their rationale.

The second objective is to elicit the main gaps in information gathering and exchange among multiple stakeholders using the identification activities described above. The activities carried out during the workshop aim to identify the current state of knowledge in the scope of the workshop but also to outline a research agenda from bringing together diverse and sometimes competing views from multiple stakeholder. One critical aspect of handling information and activities from stakeholders with multiple and diverse perspectives is how to represent, store, use and maintain this information.

This workshop proposal is a follow up activity of the interactive working session organized at the IFIP WG 13.2 working conference on Human Centered Software Engineering (https://hcse-conference.com/) [1]. That working session involved multiple research who identified the need to support multiple viewpoints and multiple models while designing interactive systems. Beyond, at the EICS 2018 conference another workshop was organized [2] to discuss heterogeneous models and modeling approaches for the description, development and analysis of interaction techniques, user interfaces, and interactive systems. The current workshop plans to address explicitly that view on heterogeneous modelling in the context of considering multiple stakeholders in the engineering process. A heterogeneous model refers [2] to a notation or a set of notations that:

1. federates more than one concept for the description of an artifact (this is the case when describing a software using a data model such as ER diagrams [4] and behavioral models such as StateCharts [5] or UML [6]);
2. combines discrete and continuous aspects (e.g., discrete and continuous Petri nets, or
3. blends together various models, each of them addressing a specific aspect of a system (e.g. Object Z [4]).

References

1. Cristian Bogdan, Kati Kuusinen, Marta Kristín Lárusdóttir, Philippe A. Palanque, Marco Winckler: Human-Centered Software Engineering - 7th IFIP WG 13.2 International Working Conference, HCSE 2018, Sophia Antipolis, France, September 3-5, 2018, Revised Selected Papers. Lecture Notes in Computer Science 11262, Springer 2019, ISBN 978-3-030-05908-8
2. Benjamin Weyers, Judy Bowen, Paolo Masci, and Philippe Palanque. 2018. Workshop on Heterogeneous Models for Engineering of Interactive System. In Proceedings of the10th ACM SIGCHI Symposium on Engineering Interactive Computing Systems (EICS '18). ACM, New York, NY, USA, 294-295.
3. Ragosta M, Martinie C., Palanque P., Navarre D., Sujan M-A. Concept Maps for Integrating Modeling Techniques for the Analysis and Re-Design of Partly-Autonomous Interactive Systems, Int. Conf. on Application and Theory of Command and Control Systems, ATACCS 2015, ACM DL, pp. 23-32
4. Chen, P. (1976) The Entity-Relationship Model - Toward a Unified View of Data, ACM Transactions on Database Systems, Vol. 1, No. 1, 1976, pp. 9-36.
5. Harel D. (1988). On visual formalisms. Commun. ACM 31, 5 (May 1988), 514-530.
6. Booch G., Rumbaugh J., and Jacobson I. 2005. The Unified Modelling Language User Guide, (2nd Edition). Addison-Wesley Professional.