Window evaluation may give **data** also for technology evaluation. Assume that an MT technology has been used for building an MT system for the language pair a-b and the question is raised how good a quality that technology would provide for another language pair c-d. Polished rough translations show the final quality for the pair a-b for a given text type. If a and b are structurally more distant from each other than c and d, window evaluation tells indirectly how good a quality is achievable for the pair c-d for a similar text type. If, on the other hand, c and d are more distant from each other than a and b, window evaluation remains silent.