The steps in constructing the p-chart: 1. Compute the average fraction defective (P) by dividing the number of defectives by the total number of units inspected. This is the center line (CL);
The steps in constructing the p-chart:1. Compute the average fraction defective (P) by dividing the number of defectives by thetotal number of units inspected. This is the center line (CL);