GAO assessed 54 programs, which represent an investment of over $800 billion, ranging from the Missile Defense Agency's Airborne Laser to the Army's Warfighter Information Network-Tactical. GAO's assessments are anchored in a knowledge-based approach to product development that reflects best practices of successful programs. The majority of programs GAO assessed are costing more and taking longer to develop than planned. Most of the programs proceeded with less knowledge at critical junctures than suggested by best practices. GAO Assessments of Selected Major Weapon Programs [PDF] | 
