The setup for grinding a type of bearing is considered under control if the bearings have a mean diameter of 5.000 mm. Normal procedure is to measure 30 bearings every 10 minutes to monitor production. Production rates are 1000 per minute. What action do you recommend if such a trial sampling of 30 bearings shows a mean of 5.060 mm with a standard deviation of 0.0025 mm? Support your answer with appropriate calculations and explain the rationale for your decision.