A factory produces bolts that must meet strict specifications: each bolt must have a length of 50.0 mm, a diameter of 10.0 mm, and a weight of 15.0 g, with a tolerance of ±0.2 mm for length and diameter and ±0.5 g for weight. A bolt is classified as defective if it significantly deviates from the specified standards.The manufacturing process is monitored daily, with defects recorded and analysed using the following control chart. Does the control chart suggest that the process is within statistical control? If not, identify any out-of-control criteria that are met. Is the manufacturing process showing signs of deterioration?
