As the complexity of weapons system increased, the percentage of major weapon systems which are subcontracted also has increased. Today, subcontractors are a critical member of the system development team. Unfortunately, the guidance provided in the Defense Acquisition Regulations (DAR), DoD instructions, and MIL-STDs leaves much to interpretation and emphasizes the cost and schedule aspects of subcontractor management in lieu of technical performance. The wide interpretation of specifications and standards often leads to poor communication, and creates inadvertent adversarial relationships. An informal poll of ten prime contractors averaging about ten major projects has resulted in statements that nearly half their projects experienced cost or schedule problems from inadequate subcontractor control.