Abstract
So-called Type 1 and 2 errors were discussed with the one channel entropy model which was introduced by the assumption that the inspectator will judge on criterion to minimize the cost expected by miss-judgments. The discrepancies of actual data from the entropy model were computed, and it was found these discrepancies varied widely by the cost ratio of good's manufacturing and recovering of rejectives.
The fact was also found that reactions were introduced naturally to move the criterion point to make even the results when the same kind of result of judgment had continued.
