The Department of Defense generally has many components. The Army, Navy, and Air Force each have their own bureaus, or organizations, which are responsible for conducting a variety of missions. These bureaus have a variety of tasks to perform, from testing and training to procurement. These organisations operate both on the national and international levels. The Secretary of Defense heads the Department of Defense. Among other functions, the Department of Defense is responsible for the procurement of defense equipment and technology. The Department of Defense is also responsible for research and development, military training, and personnel management. The Department of Defense is also responsible to coordinate the military's worldwide activities.
Other than the Department of Defense there are many federal agencies such as the Office of the Secretary of Defense or the Defense Advanced Research Projects Agency. The Department of Energy, Department of Defense Accountability Office and Department of Defense Inspector General are all other agencies. Among the various departments within the Department of Defense are the Office of the Assistant Secretary of Defense for Acquisition, the Office of the Assistant Secretary of Defense for Science and Technology, and the Department of Defense Institute for Security Governance. The Office of the Secretary of Defense, and the Office of the Assistant Secretary of Defense to Strategic Concepts are two other agencies. Numerous organizations are charged with assessing and determining the feasibility or a national defense strategy. The National Defense Sustainment and Logistics Review are also supervised by the Department of Defense.
A separate Advisory Panel on Weapon System Sustainability is also available to the Department of Defense. This group has been in existence for some time. It advises the Department of Defense regarding matters related to weapon system sustainability. This group includes representatives from academia, the defense industry, and the armed forces. The group has performed a number of studies on the feasibility of various technologies and will recommend the best path forward to meet future needs.
The Department of Defense maintains a large inventory of its assets. This includes the total aircraft inventory, the number and personnel of aircraft and personnel within the Army, Navy and Air Force, as well as the military personnel within the various branches. The inventory is supplemented by several sub-inventory group, such as the Air Force, Joint Staff and force positioning. This inventory is maintained by the Department of Defense. Anyone can access it by using a Department of Defense username and password. The inventory's most important component is the force posture. This refers to the military's readiness for combat. This is critical because it influences the overall effectiveness of a force.
The Department of Defense has a remarkable list of accomplishments to its credit. Its most notable accomplishments include the development and deployment of the F-35A fighter aircraft. This aircraft can also be used to refuel tanker aircraft and defend against missile threats from air bases. The Air Force also has a large plane procurement plan for fiscal 2019. The plan includes executive lift aircraft and operational support aircraft.