Production manager of Beta Ltd. took special care of the interest and ability of his subordinates while distributing work among them. He was of the firm opinion that a worker should be given one work again so that he may become expert in it. One day he took round of his department and noticed that the workers were not doing their job quickly. On enquiry, he learnt that the workers worked non-stop which main cause of their slow speed. He immediately issued an order that during their working hours, the workers will have an interval to take rest. (a) State the principle of management followed here? Explain. (b) Which technique of scientific management is indicated in above para? Give reason.