Toshinori Takai, Katsutoshi Shintani, Hideki Andoh and Hironori Washizaki, “A case study of applying GQM+Strategies with SysML for IoT application system development,” 4th International Conference on Enterprise Architecture and Information Systems (EAIS 2019) as a part of 8th International Congress on Advanced Applied Informatics (IIAI AAI 2019), regular paper, July 7–12, 2019, Toyama, Japan