and validate the requirements documents of major investments and acquisition programs prior to acquisition decision events of the investments or programs. (2) To ensure the requirements and scope of a major investment or acquisition program are stable, measurable, achievable, at an acceptable risk level, and match the resources planned to be available. (3) Before any entity of the Department issues a solicitation for a new contract, coordinate with other Department entities as appropriate to prevent unnecessary duplication and inefficiency and— (A) to implement portfolio reviews to identify common mission requirements and crosscutting opportunities among components to harmonize investments and requirements and prevent unnecessary overlap and duplication among components