This book constitutes the proceedings of the 15th International Conference on Research Challenges in Information Sciences, RCIS 2021, which was planned to take place in Limassol, Cyprus, but had to change to an online event due to the COVID-19 pandemic. The conference took place virtually during May 11-14, 2021. It focused on the special theme "Information Science and Global Crisis". The scope of RCIS is summarized by the thematic areas of information systems and their engineering; user-oriented approaches; data and information management; business process management; domain-specific information systems engineering; data science; information infrastructures, and reflective research and practice. The 29 full papers and 6 work-in-progress papers presented in this volume were carefully reviewed and selected from 99 submissions. They were organized in topical sections named: Business and Industrial Processes, Information Security and Risk Management, Data and Information Management, Domain-specific Information Systems Engineering, User-Centered Approaches, Data Science and Decision Support, and Information Systems and Their Engineering. The volume also contains 13 poster and demo papers, and 4 doctoral consortium papers. In addition, two-page summaries of tutorials and research project papers can be found in the back matter.

This book constitutes the thoroughly refereed post-conference proceedings of theFirst International Workshop on Usability and Accessibility focused RequirementsEngineering, UsARE 2012, held in Zurich, Switzerland, in June 2012 in conjunctionwith ICSE 2012, the 34th International Conference on Software Engineering, and theSecond International Workshop, UsARE 2014, held in Karlskrona, Sweden, in August2014, in the course of RE 2014, the 22nd International Requirements EngineeringConference.This book consists of 10 chapters of which 9 are extended versions of the paperspresented at the two UsARE events. Amongst them, 3 are extended versions of thepapers presented at UsARE 2012 and 6 are extended versions of papers presented atUsARE 2014 - rounded off by a new chapter that was added as authors are doingrelevant work on the same topic. The chapters are organized into three sectionsaccording to their main focus: usability and user experience, accessibility andapplications.

This book constitutes the proceedings of the 23rd International Working Conference on Requirements Engineering - Foundation for Software Quality, REFSQ 2017, held in Essen, Germany, in February/March 2017. The 16 full papers and 10 short papers presented in this volume were carefully reviewed and selected from 77 submissions. The papers were organized in topical sections named: use case models; ecosystems and innovation; human factors in requirements engineering; goal-orientation in requirements engineering; communication and collaboration; process and tool integration; visualization and representation of requirements; agile requirements engineering; natural language processing, information retrieval and machine learning traceability; quality of natural language requirements; research methodology in requirements engineering.