According to White 2000, internal evaluation occurs on continual or periodic bases in the course of research and development. Internal evaluations test whether, for example, the components of an experimental prototype or pre- release system work as they are intended.
This type of evaluation mainly concerns functionality and needs to show coverage of the fundamental contrastive phenomena of the language pair, just like feasibility evaluation. However, at this point in a system's life cycle, it must also be shown that the system is actually improving as a result of development (changeability), and that improvement in one area does not make something else worse (stability). (In terms of EAGLES 1996, this is a progress evaluation).
Translation process models (2.1.1/402)
Coverage (2.2.1.1.2.1/504)
Readability (2.2.1.1.1.1/172)
Terminology (2.2.1.2.3/175)
Accuracy (2.2.1.2/177)
Well-formedness (2.2.1.3/186)