The European Commission gave presentations regarding the Integrating Activities (I3-projects) in FP6. An overview of the funded projects shows an average number of contractors of 19 of which 7 are offering access. Proposals should therefore reasonably have at least some 10 partners. The number of partners as such is not a criterion and largely depends on the subject and character of a project. There is hardly any "golden key" regarding consortium size. However, only partners who are necessary to conduct the work proposed should be included in the consortium. Expert panels or similar should be integrated with an appropriate association mechanism.