be retrospective. At least if the data should be available within reasonable time. Then
the use of multiple respondents becomes even more important in order to be able to
assess reliability. Thus, the data collection will be challenging in some areas, but
rather straight-forward in others. We hope the challenges do not defer researchers to
put the model to test. The value that lies in having this model tested is potentially
great as the construction literature has many indications that cooperation and
collaboration may be a good strategy for achieving project success, but empirical
evidence delineating this in a more holistic way is lacking. We hope that this is just a
temporary situation.