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.
MIDI is a protocol that was developed so that electronic instruments could communicate with each other as well as computers and other electronic devices. Through MIDI, a variety of musical information can be transmitted. MIDI is not only used to indicate what note is played, but the duration of the note, the velocity/volume, and sometimes the aftertouch or other information as well. MIDI is also used to transmit non-note information such as pan, effects, track or overall volume, and the like. In essence, MIDI is a basic communications protocol used by musical instruments and computers, much like Firewire is a protocol for computers and peripheral devices like hard drives, scanners, and camcorders.