Abstract: This metric is the ratio of the maintenance personnel who are actively doing the maintenance work (direct) to the maintenance personnel supporting the maintenance work (indirect). Direct personnel include those workers in the maintenance department that repair, maintain, modify or calibrate equipment.
MIDI (Musical Instrument Digital Interface) is a protocol designed for recording and playing back music on digital synthesizers that is supported by many makes of personal computer sound cards. Originally intended to control one keyboard from another, it was quickly adopted for the personal computer.
By enabling musical information to be exchanged between connected electronic instruments MIDI opened up vast new possibilities in music. MIDI allows one person to have total control over a number of instruments simultaneously. As a result, a revolution in the production of electronic music and an explosion of musical styles has occurred.