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Why: Facilitates speedy repairs by providing maintenance technology above the craftsman level and up to but not including reliability engineering principles.

When: Provides expertise for more complicated maintenance tasks or when organization and oversight is required and time is of the essence for fast repairs.

Where: Provides on-site expertise to aid craftsmen to solve non-standard repairs without hands-on tool contact. Maintenance engineers serve as liaison with reliability engineers.

These definitions are written by H. Paul Barringer and are also posted on his web site at

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