A method is provided for developing an architecture model for a system-of-systems (SoS) that includes n system levels L.sub.1 . . . L.sub.n, each of which includes at least one component of the SoS. For at least i>1, each system level L.sub.i includes at least one component of level L.sub.i-1. The method includes developing an architecture model for at least one level of the SoS. For at least i>1, the level L.sub.i-1 architecture model can be developed by developing a functional architecture model for level L.sub.i-1, and thereafter transforming the level L.sub.i-1 functional architecture model into a physical architecture model for level L.sub.i-1. The functional architecture model includes a functional and a logical structure for level L.sub.i-1. And as such, the functional architecture model is developed based upon a concurrent functional and logical decomposition of a functional architecture model developed for level L.sub.i.