; (D) ensure good acquisition program management of cost, schedule, risk, and system performance of the acquisition program at issue, including assessing acquisition program baseline breaches and directing any corrective action for such breaches; and (E) ensure that acquisition program managers, on an ongoing basis, monitor cost, schedule, and performance against established baselines and use tools to assess risks to an acquisition program at all phases of the life cycle of such program to avoid and mitigate acquisition program baseline breaches. (3) Acquisition decision event The term acquisition decision event , with respect to an acquisition program, means a predetermined point within each of the acquisition phases at which the acquisition decision authority determines whether such acquisition program shall proceed to the next acquisition phase. (4) Acquisition decision memorandum The term acquisition decision memorandum , with respect to an acquisition, means the official acquisition decision event record that includes a documented record of decisions, exit criteria, and assigned actions for such acquisition, as determined by the person exercising acquisition decision authority for such acquisition. (5) Acquisition program The term acquisition program means the process by which the Department acquires, with any appropriated amounts, by contract for purchase or lease, property or services (including construction) that support the missions and goals of the Department. (6) Acquisition program baseline The term acquisition program baseline , with respect to an acquisition program, means a summary of the cost, schedule, and performance parameters, expressed in standard, measurable, quantitative terms, which must be met in order to accomplish the goals of such program. (7) Best practices The term best practices , with respect to acquisition, means a knowledge-based approach to capability development that includes— (A) identifying and validating needs