REFSQ 2022: Joint Proceedings of Workshops, Doctoral Symposium, and Posters & Tools Track Jannik Fischbacha,b a Netlight Consulting GmbH, Sternstraße 5, 80538, Munich, Germany b University of Cologne, Albertus-Magnus-Platz, 50923, Cologne, Germany 1. Preface The 28th International Working Conference on Requirement Engineering: Foundation for Software Quality (REFSQ 2022) took place from the 21st to the 24th of March 2022. In compliance with current COVID guidelines for hosting safe events, the conference was held as a live, in-person event in Aston, Birmingham, UK. REFSQ Working Conferences aim to provide a forum for discussing new and innovative ideas and approaches to successful Requirements Engineering (RE) and for exchange between researchers and practitioners. The special theme of REFSQ’22 was “Explainability in Requirements Engineering” including how to elicit, specify and validate requirements for explainability in software systems, and how to design and implement systems whose behavior in specific instances is explainable, back to their requirements and associated rationale. The REFSQ conferences also have a tradition of hosting associated events, where participants are able to focus on emerging topics of RE as the foundation of software quality. Also the co-located events kept in mind the special theme of the conference. On the workshop day, 21st of March, three workshops and the Doctoral Symposium were organized, whereas the Posters and Tools Track took place on the 22nd of March. The three workshops at REFSQ 2022 were carefully selected based on their quality, attractiveness, and their potential to attract attendants, which was lead by our co-chairs Nelly Condori-Fernandez and Joerg Doerr. This resulted in the following workshops: • NLP4RE: 5th Workshop on Natural Language Processing for Requirements Engineering (organized by Fabiano Dalpiaz, Davide Dell’Anna, Sylwia Kopczyńska, and Lloyd Mont- gomery). Natural language processing (NLP) has played an important role in several areas of computer science, and requirements engineering (RE) is not an exception. In the last years, the advent of massive and very heterogeneous natural language (NL) RE- relevant sources, like tweets and app reviews, has attracted even more interest from the In: J. Fischbach, N. Condori-Fernández, J. Doerr, M. Ruiz, J.-P. Steghöfer, L. Pasquale, A. Zisman, R. Guizzardi, J. Horkoff, A. Perini, A. Susi, M. Daneva, A. Herrmann, K. Schneider, P. Mennig, F. Dalpiaz, D. Dell’Anna, S. Kopczyńska, L. Montgomery, A. G. Darby, and P. Sawyer (eds.): Joint Proceedings of REFSQ-2022 Workshops, Doctoral Symposium, and Poster & Tools Track, Birmingham, UK, 21-03-2022, published at http://ceur-ws.org Envelope-Open jannik.fischbach@netlight.com (J. Fischbach) Orcid 0000-0002-4361-6118 (J. Fischbach) © 2022 Copyright for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 International (CC BY 4.0). CEUR Workshop Proceedings http://ceur-ws.org ISSN 1613-0073 CEUR Workshop Proceedings (CEUR-WS.org) RE community. The main goal of the NLP4RE workshop is to serve as a regular meeting point for the researchers on NLP technologies in RE. NLP4RE aims to promote the timely communication of advances, challenges, and barriers that the researchers encounter, and the workshop wishes to provide a friendly venue where collaborations may emerge naturally. • RE4AI: 3rd International Workshop on Requirements Engineering for Artificial Intelli- gence (organized by Renata Guizzardi, Jennifer Horkoff, Anna Perini, and Angelo Susi). The main goals of the RE4AI workshop include raising awareness in the RE community about the importance of RE in realizing trustworthy AI systems; bringing in the same room people from AI and RE industry and academia to discuss pressing issues, such as how RE can contribute to prevent AI systems to fail or to go rogue; setting up the basis for collaboratively producing a report on the challenges, candidate solution paths, and research priorities regarding RE4AI; and motivating cross-fertilization between AI and RE works. • DT: Design Thinking, Design Fiction and Requirements Engineering (organized by An- drew Darby, Peter Sawyer, Wei Liu, and Nelly Bencomo). The goal of the workshop is to gain a better understanding of how the RE community is responding to technological/so- cietal/political and other forms of volatility that shape some of the wicked problems they address. What can RE learn from recent examples of systems that have inadvertently harmed business, society, or people? What can RE learn from design thinking, design fiction, and their speculative strategies? Due to current uncertainties caused by the COVID pandemic and many concurrent deadlines, the workshops received fewer submissions than usual. This led to the decision of joining the NLP4RE workshop and RE4AI workshop into a one-day workshop. Accordingly, the proceedings contain a joint section of four NLP4RE papers and one RE4AI paper. The proceedings contain also the content of the following tracks: Doctoral Symposium The goal of the Doctoral Symposium (organized by Liliana Pasquale and Andrea Zisman) is to provide PhD students with an opportunity to present and discuss their work in early as well as advanced stages of their doctoral research, to provide all participant students with advice and suggestions from a panel of senior researchers, and to facilitate interaction among all participants. Posters and Tools Track The Posters and Tools Track (organized by Marcela Ruiz and Jan- Philipp Steghöfer) is a forum to present posters and demonstrate tools covering any aspect of RE. It gives researchers the chance to present their most recent work and obtain early feedback on ongoing research. Acknowledgments We would like to thank all Workshops, Doctoral Symposium, and Posters & Tools Track Chairs, as well as their Program Committees, for their diligence in selecting the papers and ensuring their high scientific quality.