World Package 6 (WP6) aims at designing flexible and lightweight mechanisms for social orchestration of HDA-CASs by effectively addressing the issue of compositionality between humans and machines as a basic architectural and structural principle. The novel methods designed will be able to express complex distributed multi-layered workflows of adaptive social computation, supplemented by methods for managing their evolution. We will not rely on the a priori design of such mechanisms, but will also devote a large part of activities to the study of evolving social structures in diverse HDA-CASs. In this respect, WP6 will use “big data” methods to identify at run time emergent social structure, and ensure robustness and scalability by feeding these analysis results back into the design of social orchestrations in a self-adaptive way.