12. A test case generation system, comprising: a processor configured to: extract descriptions from document artifacts stored on a database, the descriptions including a first subset of descriptions that cannot be understood correctly, and a second subset of other ordinary descriptions; extract, via a morphological analyzer, a first set of keywords including conjunctions and verbs from the descriptions; construct as document categorizer; categorize, via the document categorizer, the descriptions to a first set and a second set; extract a second set of keywords including nouns that occur in the second set; generate a test case from the second set of keywords; output descriptions that are not understood; and generate a first frequency for each extracted noun in the descriptions and a second frequency for each extracted noun in the second set.
14. The system as claimed in claim 12 wherein the processor is further configured to generate a score for each extracted noun.