Garver & Mentzer (1999) pointed out that SEM is a very useful statistical instrument. Garver & Mentzer (1999) also advised performing and reporting all kinds of construct validity tests “to give the reader a greater level of confidence in the research findings”. Following them, we performed some exploratory and confirmatory factor analysis before attempting the estimation of the complete model. Such analysis advised discarding the first proposed measure of internal integration in the Logistics-Production interface, since we detected two different factors associated with it. The rest of the measures were judged appropriate in the light of the results of most of the tests suggested by Garver and Mentzer. Those are reported in table A2, in the appendix.