It is desired to monitor project completion times by analysts in a consulting company. The magnitude and complexity of the project influence the completion time. It is also believed that the variability in completion time increases with the magnitude of the completion time. Table 7-27 shows recent project completion times (days) along with their complexity. Complexity is indicated by letters A, B, and C, with complexity increasing from A to B and B to C. Construct an appropriate control chart and comment on the process.