I. Introduction
Systems of Systems Engineering (SoSE) is a collection of techniques that support the development and maintenance of a potentially complex aggregate of independently owned and managed systems that are relied upon to provide an emergent service. The nature of the systems that form this aggregate vary in terms of the domain of application, level of independence, ownership, manageability, etc. This variance potentially leads to a plethora of seemingly incompatible models, methods and techniques, and the effective engineering of SoSs depends on their coordinated use.