This volume contains the papers presented at IWESQ 2023: 5th International Workshop on Experience with SQuaRE series and its Future Direction held on December 4, 2023 in Seoul (Hybrid). There were 6 submissions. Each submission was reviewed by two program committee members. The committee decided to accept 6 papers. Its acceptance rate is 100%. The program includes one keynote speech made by Mr. Toshihiro Komiyama. The ISO/IEC 25000 (Systems and Software Quality Requirements and Evaluation: SQuaRE) series is a set of international standards for systems and software, data and IT service quality, which has been widely used for a couple of decades. In the research field, it have been also examined as a tool for performing various analyses and evaluations on systems and software quality. The 5th International Workshop on Experience with SQuaRE series and its Future Direction (IWESQ 2023) aims at sharing such research outcomes and issues, and experience of practical applications of the SQuaRE series, in order to promote much more fruitful research and practice for quality systems and software products. Furthermore, we gratefully acknowledge the professional work of the international program committee members, who have contributed substantially with their highly qualified referee reports. In addition, we owe great thanks to the APSEC conference organization members for their dedication and professionalism in taking care of the many aspects of conference management. Moreover, we would like to thank the developers and other professional staff of EasyChair.org, who made it possible for us to use the resources of this excellent and comprehensive conference management system, from the call of papers and inviting reviewers, to handling paper submissions, communicating with the authors, and creating the online volume of the conference proceedings. We also want to thank all presenters and attendees for actively contributing to the success of IWESQ 2023. We are looking forward to excellent presentations and fruitful discussions, which will broaden our professional horizons. All participants are invited to make new friends within the community of SQuaRE users.
Tsuyoshi Nakajima Toshihiro Komiyama Alessandro Simonetta Andrea Trenta Domenico Natale Rau´l Mart´ınez Hyunchong Kim Lizhi Cai Yangyang Zhang Bill Curtis Shinichi Fukuzumi Noriko Wada Yukio Tanitsu Maria Cristina Shibaura Institute of Technology, Japan NEC Corporation, Japan University of Rome, Italy TIM, Italy AgID, Italy IRAM, Argentina TTA, South Korea CESI, China China Electronics Standardization Institute, China CAST Research Lab., USA RIKEN, Japan Yamanashi Eiwa college, Japan ITSCJ, Japan Inail, Italy