1. Japan Software Process Improvement Consortium: http://www.jaspic.org
2. Wada, N., Norimatsu, S., Kishi, T.: Analysis of SPI strategies and their modeling – Exploring the art of SPI promotion. In: Industrial Proceedings, EuroSPI2012 (European Systems Software & Service Process Improvement & Innovation) (2012)
3. Norimatsu, S., Endo, K., Usugi, M., Niwa, A., Tange, K.: Formulation of process improvement knowledge: 7 components of a good PI story. J. Softw. Evol. Proc. 31, e2107 (2018)
4. Norimatsu, S., Kishi, T., Wada, N.: Development of “SPI Strategy Framework” and its application. In: Industrial Proceedings, EuroSPI2018 (European Systems Software & Service Process Improvement & Innovation) (2018)
5. The SPI Manifesto. http://2019.eurospi.net/images/eurospi/spi_manifesto.pdf. Alcala EuroSPI 2009