Preface This book constitutes the CEUR proceedings of the (a) 20th CIAO! Doctoral Consortium (20th CIAO! DC) and (b) Enterprise Engineering Working Conference Forum 2020 (EEWC Forum 2020), held in conjunction with the 10th Enterprise Engineering Working Conference (EEWC2020), initially to be held at Bozen / Bolzano, Italy, in September as part of BOSK 2020, but changed to a online event due to the COVID19 pandemics situation, which occurred during September 28th, October 19th and November 9th-10th, 2020. The Enterprise Engineering Working Conference addresses the emerging field of Enterprise Engineering (EE), having as goal to gather academics and practitioners in order to share innovative research issues and practical experiences, mixing rigour and relevance, and to facilitate profound discussions on the domain of Enterprise Ontology, Normalized Systems, Foundational Ontologies, Enterprise Interoperability, Standards and Policies in various sectors/domains, and other Enterprise Engineering topics. One of the ways to involve researchers and practitioners is to organize complementary events to the main conference. These complementary events provide an additional opportunity to promote discussion in the EE field regarding new emerging themes that are being researched. In addition, it integrates the EE community with industrial initiatives, increasing the academic and industry collaboration. This volume contains (a) seven papers from EEWC Forum 2020 and (b) two papers from 20th CIAO! DC where two PhD students presented their current stage of research and received feedback for future steps. Finally, we thank all the participants, the authors and the reviewers for their contributions to these EEWC collocated events and hope that you find this proceeding useful to further explore the Enterprise Engineering challenges. Sérgio Guerreiro, INESC-ID, Instituto Superior Técnico, Universidade de Lisboa, Portugal Pedro Sousa, INESC-ID, Instituto Superior Técnico, Universidade de Lisboa, Portugal David Aveiro, University of Madeira and Madeira Interactive Technologies Institute, Portugal Giancarlo Guizzardi, Free University of Bozen-Bolzano, Italy Robert Pergl, Czech Technical University in Prague, Czech Republic Henderik A. Proper, Luxembourg Institute of Science and Technology, Luxembourg