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| Kearney & Trecker 800 at General Motors Powertrain in Pontiac, Michigan | Windows-based machinist's interface on GM K&T 800 |
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| Tool changer and spindle on K&T 800 | 3-axis desktop milling machine at NIST |
These installations are intended to validate that the candidate interfaces serve their intended purposes: to support the "-ilities." For example, on the EMC at General Motors, the interface to motion control was validated by interchanging motion control boards from two independent vendors. On the EMC at Boeing, the interface to part program interpretation was validated by developing interpreters for two dialects of the RS-274 "G code" language. Extensibility was validated on the GM EMC through the addition of a non-contact probing application.
The point of these installations is not to test that the controller implementation per se was open, but that the interfaces definitions were complete and detailed enough to support these aspects of openness.