MIL-STD-883G is the United States military test method standard for microcircuits, and it is the catalogue from which a military or space programme selects the individual methods used to qualify, screen and characterise a semiconductor device. The methods are numbered by group, and they cover electrical tests of parametric and functional performance, the environmental tests that demonstrate resistance to temperature cycling, thermal shock, moisture, mechanical shock and vibration, the life and burn-in tests used to establish reliability, and the destructive tests used to characterise construction. Two aspects of the standard are widely known outside military procurement: the screening sequence applied to every device before delivery, which is what distinguishes a military grade part from a commercial one, and the classification of electrostatic discharge sensitivity, which is assigned by reference to the human body model method of this standard and which determines the handling precautions and the packaging the device requires.