Boardwork Electronics manufactures 35,000 circuit boards per month. A random sample of 875 boards is inspected each week for four different characteristics.
During a recent week, 2 defects were found for the first characteristic, 3 defects were found for the second characteristic, 1 defect for the third characteristic, and 5 defects for the fourth characteristic.
a) Based on the inspection results, what is the dpmo for each characteristic?
b) What is the overall dpmo for the circuit board process?
For Boardwork’s circuit board process described in Problem 1, determine the sigma level for each characteristic and the sigma level of the overall process.