; (B) providing technical support for the Joint Force in exploring and analyzing new capabilities, operational concepts, and systems-of-systems composition, including through advanced modeling and simulation; and (C) executing associated experimentation, through the Rapid Defense Experimentation Reserve (RDER) or another mechanism. (2) The Executive Director for Acquisition, Integration, and Interoperability of the Office of the Under Secretary of Defense for Acquisition and Sustainment shall be responsible for— (A) enabling the acquisition of cross-domain, joint, and cross-system kill chains and mission capabilities, including resourcing of modifications necessary for integration and interoperability among kill chain and mission components; and (B) ensuring the effectiveness of cross-domain, joint, and cross-system kill chains and mission capabilities through analysis and testing. (3) The Chief Digital and Artificial Intelligence Officer shall be responsible for creating and operating a factory-based approach for software development that allows for iterative, secure, and continuous deployment of developmental, prototype, and operational tools and capabilities from multiple vendors to test networks and operational networks for combatant commanders to— (A) gain operational awareness, make decisions, and take actions; (B) integrate relevant data sources to support target selection, target prioritization, and weapon-target pairing