During the presidential campaign, Obama expressed support for Constellation but after the election, he set up a panel of outside experts to review NASA's plans and how much they might ultimately cost.
High rejection counts would suggest either poor quality of work or a poor document review process; either could adversely impact cost, schedule, and customer satisfaction.
The National Audit Office report also states that the UK faces a potential shortage of attack submarines because of cost-cutting decisions taken in last year's strategic defence and security review.