Final answer:
Control charts are used in statistical quality control to detect performance trends away from normal operations.
Step-by-step explanation:
Statistical quality control often involves the use of control charts whose basic purpose is to A. Detect performance trends away from normal operations. Control charts are used to monitor a process and detect any deviations or trends that indicate a shift away from normal and expected performance. By analyzing the data plotted on the control chart, quality control specialists can identify and address potential issues before they lead to defects or errors.