A p Chart for Circuit Failures Batches 10 and 19 have unusually high proportions of failing circuits. Subsequent investigation identifies special causes for both batches, and it is decided to ...

However, look at the R chart first. Consequently, if the R chart is out of control, then the control limits on the Xbar chart are meaningless. Table 1 shows the formulas for calculating control ...

Is it a probability limit? Is it an economic limit? Read on to find out! A control chart consists of several parts. It has two limits. The bottom dashed line is called the lower control limit (LCL ...