Q:1-A company generates 22,700 Defects Per Million Opportunities. What is the Sigma level performance of the company?
Mark one answer:
4.0
3.7
1.2
2.8
3.5

Q:6-A Six Sigma team within the Finance Department is working on a project to reduce the number of journal entry errors, which are delaying the monthly closing process. The team has gathered data over time, and wishes to track the percentage of erroneous entries using a p chart. If p-bar is 0.036, and n = 2,000, what is the Upper Control Limit for the chart?
Mark one answer:
0.036
0.072
0.144
0.048
0.108

Q:7-A Lean Six Sigma team working to reduce the amount of bad debts is tracking the dollar amount of receivables over 90 days past due. The team is using an Individuals and Moving Range control chart (XmR or ImR chart). The average balance outstanding (X-bar) is $736,500. The Mean Moving Range is $58,000. What is the upper control limit for the Individuals (X) chart?
Mark one answer:
$926,160
$918,620
$910,500
$890,780
$818,620

Q:8-An order processing operation has a specification of 4.0 hours + or - 1.0 hours. The process mean is 4.2 hours, with a standard deviation of 0.25 hours. The process is stable and normally distributed. What is the Cp and Cpk of the process?
Mark one answer:
2.67, 1.33
1.07, 1.33
2.67, 1.07
1.33, 1.07

Q:9-A Six Sigma team wishes to calculate Cpk in order to assess the capability of an order entry process. The team has determined that the process data are not normally distributed (the distribution is skewed after all confirmed outliers have been removed). What should the team do?
Mark one answer:
Use Cp instead of Cpk.
Remove the data points that are causing the skewness as they may be outliers.
Adjust the Cpk calculation by 1.5 standard deviations.
Transform the data to more closely fit a normal distribution.
Eliminate the underlying source of variability before calculating Cpk.

Q:10-An SPC chart of a process under study has several recent plot points outside of the lower control limit. The team has taken actions to move the process in this direction, so the out-of-control condition is a favorable shift. The Six Sigma team wants to calculate the Cpk in order to assess process capability. What should the team do?
Mark one answer:
Calculate the Cpk using data prior to the out-of-control condition.
Calculate the Cpk using all data since the out-of-control condition may be favorable.
Collect 20 additional data points to confirm the process shift, confirm stability, then calculate Cpk from data collected after the shift.
Calculate Cp instead of Cpk
Calculate Ppk instead of Cpk.