Qualitative research can be performed in many traditions, Walsham mentions three types of epistomologies: Positivism, Interpretative (or Non-positivism) and Normativism. This thesis uses the interpretative approach when collecting and analysing data for three reasons: First, I prioritised insight into the cases over reliability for other researchers to reproduce the studies. Second, I judged it impossible to disregard any pre-conceptions I had based on more than ten years of of professional experience of designing and developing software-intensive embedded systems. Third, most of the descriptions of the case studies are based on interview data which already are the interviewees' interpretation of the actual events/facts/situations/...
|Case||Company||Description||Data sources||Author role||Chapter(s)|
|I||VCC||Forces shaping the distributed in-vehicle EE architecture in P2 platform||Interviews with 20 developers + design documents||Insider observer||5, 7, 10|
|II||VCC||Comparative case study on architecting process on existing platforms||Interviews with 6 architects + design documents + personal notes||Insider observer||6, 7, 10|
|III||Scania||Comparative case study on architecting process on existing platforms||Interviews with 5 architects + design documents + personal notes||Observer||6|
|IV||VCC||Case study on architecture decisions for new platform||Observed decisions during 3 months||Participant / insider observer|
|V||VCC||Post mortem analysis of Sensus infotainment development||Interviews with 6 key developers + design documents||Insider observer||7, 10|
|VI||VCC||Proof-of-concept development of android-based infotainment system||All project & design documents of both product owner and Scrum team + personal notes||Participant / insider observer||9, 10, 11|
|VII||VCC||Agile development of climate control software||Official meeting notes and presentations + personal notes||Insider observer||7, 10|
|VIII||VCC||Agile development of next generation infotainment system||Official meeting notes and presentations + personal notes||Insider observer||10|
The selection of interviewees were in cases I, II, III and V done as purposive samples in order to cover a comprehensive variety of roles and teams at the studied organisations.
* A case study being ``an empirical study that investigates a contemporary phenomena in depth and within its real-life context, especially when the boundaries between the phenomenon and the context are not clearly evident''