As i understand from the authors question, author is asking the limit of maximum number of SOP's can undergo training per day. In case of new employee training If that is the case if we consider the self reading each SOP will take 1/2 an hour on an average. so 15 SOP per day is almost 8 hrs with out break and deviation. it is not possible.
case 2 is class room training, in that case there may be some deviations from the schedule of the training and discussion may happen , doubt clarity may happen and 15 SOP per day is not possible.
Hope this answer clarified your question.