The detailed elements of a process or method used to produce a specific result.

Demonstration that a fabricating process, such as welding, made by a specific procedure can meet given standards.

Positively charged particles which are part of the nucleus of atoms.

Mode of metal transfer somewhat between spray and short circuiting. The specific power source has built into it two output levels: a steady background level, and a high output (peak) level. The later permits the transfer of metal across the arc. This peak output is controllable between high and low values up to several hundred cycles per second. The result of such a peak output produces a spray arc below the typical transition current.