Printed circuit boards used in several different avionics

devices are 100% tested for defects. The batch

size for each board type is relatively small, and management

wishes to establish SPC using a short-run

version of the c chart. Defect data from the last two

weeks of production are shown in Table 10E.3. What

chart would you recommend? Set up the chart and

examine the process for control.

TABLE 10E.3 Defect Data for Exercise 10.4 Total Total Production Part Number Production Part Number Day Number of Defects Day Number of Defects 245 1261 16 251 4610 10 1261 10 4610 0 1261 15 1261 20 246 1261 8 1261 21 1261 11 252 1261 15 1385 24 1261 8 1385 21 1261 10 247 1385 28 1130 64 1385 35 1130 75 1261 10 1130 53 248 1261 253 1055 16 8611 47 1055 15 8611 45 1055 10 249 8611 53 254 1055 12 8611 41 8611 47 1385 21 8611 60 250 1385 25 255 8611 51 1385 29 8611 57 1385 30 4610 4610 6 4610 4610 8