Which of the following is a disadvantage of the departmental overhead rate method? the departmental overhead rate method assigns overhead on the basis of volume-related measures. the departmental overhead rate method is more refined than the plantwide overhead rate method. the departmental overhead rate method does not assign overhead on the basis of volume-related measures. the departmental overhead rate method is simpler and less costly to implement than the plantwide rate method. there are no disadvantages of the departmental overhead rate method.