ABSTRACT
The Department of Defense (DoD), industry and academia have been investing in system monitoring technologies for man-made machines over the past several decades. In fact, the DoD established a policy in 2007 called Condition-Based Maintenance Plus (CBM+) for incorporating automatic monitoring technologies across its weapon systems [1]. The goal of CBM+ is to increase weapon systems availability and reliability while reducing downtime and operational cost. Many advances have been and are continuously being made for monitoring machines such as automobiles, locomotives and aircraft. However, the most valuable asset in the DoD arsenal is not being monitored at all during operations, the human machine.
