  Despite growing interest of Open Innovation (OI) in Software Engineering
(SE), little is known about what triggers software organizations to adopt it
and how this affects SE practices. OI can be realized in numerous of ways,
including Open Source Software (OSS) involvement. Outcomes from OI are not
restricted to product innovation but also include process innovation, e.g.
improved SE practices and methods. This study explores the involvement of a
software organization (Sony Mobile) in OSS communities from an OI perspective
and what SE practices (requirements engineering and testing) have been adapted
in relation to OI. It also highlights the innovative outcomes resulting from
OI. An exploratory embedded case study investigates how Sony Mobile use and
contribute to Jenkins and Gerrit; the two central OSS tools in their continuous
integration tool chain. Quantitative analysis was performed on change log data
from source code repositories in order to identify the top contributors and
triangulated with the results from five semi-structured interviews to explore
the nature of the commits. The findings of the case study include five major
themes: i) The process of opening up towards the tool communities correlates in
time with a general adoption of OSS in the organization. ii) Assets not seen as
competitive advantage nor a source of revenue are made open to OSS communities,
and gradually, the organization turns more open. iii) The requirements
engineering process towards the community is informal and based on engagement.
iv) The need for systematic and automated testing is still in its infancy, but
the needs are identified. v) The innovation outcomes included free features and
maintenance, and were believed to increase speed and quality in development.
Adopting OI was a result of a paradigm shift of moving from Windows to Linux.
