 The results of the analysis provide the basis for the Technology Development Strategy (TDS), which must be approved by the MDA at program's Milestone A.† The AoA is executed before any solution is determined, and is updated throughout the life of the program.The AoA attempts to arrive at the best value for a set of proposals received from the private sector or other sources.Though Source Selection criteria change per proposal request, and specifics are considered sensitive information, there is usually some form of the Cost Schedule Performance (CSP) trade-space analysis, and strong consideration of Risk, (CSPR).