How many times have you been to the doctor or hospital for some ailment and the diagnosis was wrong? Getting to the root of most any problem within a complex situation is tough-even for professionals.

Gear and clutch problems in the Osprey have killed more than a dozen troops in recent years, leading to groundings of the tilt-rotor aircraft. (Sgt. Armando Elizalde/U.S. Marine Corps) The Navy has ...