MagicDragon - Yes Industrial metal is "manufactured" all right. Not at GM, but in a studio with lotsa synthesizer and drum sequencers etc. Watch Nine Inch Nails, the bands just one guy with lotsa gizmos for manufacturing music.

http://www.youtube.com/watch?v=Gm1KiY1FCFw&feature=related

http://www.youtube.com/watch?v=ZkL5QZzh7KI&feature=related

http://www.youtube.com/watch?v=V0u0AG_floQ

Wiki Definition-
Industrial music is a loose term for a number of different styles of experimental music, especially but not necessarily electronic music. The term was first used in the mid-1970s to describe the then-unique sound of Industrial Records artists. Since then, an extremely wide variety of labels and artists have since come to be called "Industrial."

The first industrial artists experimented with varying degrees of noise, production techniques and what, at the time, were considered controversial topics. Their production was not only limited to musical output. It also included mail art, performance art, installation pieces and other art forms.[1]