Acquisition Program Baseline. A document that contains the most important cost, schedule, and performance parameters (both objectives and thresholds) for the program. It is approved by the Milestone Decision Authority (MDA), and signed by the program manager (PM) and his/her direct chain of supervision, e.g., for acquisition category (ACAT) ID programs it is signed by the PM, program executive officer (PEO), component acquisition executive (CAE), and defense acquisition executive (DAE).