As organizations merge or collaborate closely, an important question is how their existing software assets should be handled. If these previously separate organizations are in the same business domain - they might even have been competitors - it is likely that they have developed similar software systems. To rationalize, these existing software assets should be integrated, in the sense that similar features should be implemented only once.
We have previously made qualitative observations on this topic. This report describes the follow-up study, which was performed in the form of a questionnaire aimed at validating and quantifying the previous observations. This report describes the research design, present the questionnaire together with all responses, and make some statistical analyses. This will form a basis for further publications with deeper analyses.