Reliability of equipment and evaluability of video recording
We counted the number of video answer files that should be received and the number of video answer files actually received in the four bases. Equipment reliability was measured as the number of video answer files actually received divided by the number of video answer files receivable. The examiners evaluated the quality of audio and video recordings of all scoring points during network rating. Evaluability was measured as the number of evaluable scoring points divided by the total number of scoring points.