Triple U manufactures antistatic tubes at the rate of 180 tubes / hr. It has 30 workers equally distributed in 3 shifts with 4 5min break. It has 5 working days per week and 4 week / month. Man machine ratio is 1:1 and they have 12 machines what will be your recommendation to avoid the same problem in the future? Choose the best answer Select one: O a. Ensure that there is buffer for the raw materials that are going to be used O b. Call the attention of the Production Planner for not being able to oversee the shortage of raw materials O c. Be strict with the purchasing department O d. All of the above