STATS 135-B

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5. 4 processes have same value of Cpand the USL and LSL values equal to 62 and 38 respectively. Which one of those performs the best?

a) Centered at 50

b) Centered at 44

c) Centered at 54

d) Centered at 63

6. If Cp=Cpkwhich of these is true?

a) Process is centered at the LSL of the specifications

b) Process is centered at the USL of the specifications

c) Process is centered at the midpoint of the specification

d) Process is centered at the outside the specification limits

7. Which of these gives the best performance of the process?

a) Cp= Cpk

b) Cp- Cpk= Cpk

c) Cp> Cpk

d) Cp< Cpk

8. Which of these is correct?

a) Cpk=min(Cpu, Cp)

b) Cpk=min(Cpu, Cpl)

c) Cpk=max(Cpu, Cp)

d) Cpk=max(Cp, Cpl)

1. What should be the minimum value of PCR Cpfor a six-sigma company?

a) 2.0

b) 1.0

c) 3.0

d) 1.3

2. What should be the position of the process mean for the calculation of the PCR Cp?

a) Near to the USL

b) Near to LSL

c) Centered between LSL and USL

d) CpDoes not take this into account

3. What is the function of Cp?

a) To measure the value of process mean

b) To measure the value of the process standard deviation

c) To measure the USL and LSL of the quality characteristic

d) To measure the spread of the specifications relative to the six sigma spread

4. Which one of the processes performs the best?

a) The one which operates near the USL

b) The one which operates near the LSL

c) The one which operates at the midpoint of the interval between the specifications

d) The one which operates outside the specifications

9. Which of these is a correct definition for the Cpk?

a) Cpkis the one sided PCR for the specification limit nearest to the standard deviation of the process

b) Cpkis the one sided PCR for the specification limit farest to the standard deviation of the process

c) Cpkis the one sided PCR for the specification limit farest to the average of the process

d) Cpkis the one sided PCR for the specification limit nearest to the average of the process

10. If Cp>Cpkwhat conclusion can be carried out about the process?

a) The process has its operation at the midpoint of the interval between the specifications

b) The process operates off-center

c) The process performance is the best possible for that Cp

d) The process can't perform any better for same Cp

11. For a process, the upper specification limit and lower specification limits are 62 and 38 respectively. If the process has its mean equal to 53, and its standard deviation 2, what is the value of Cpkfor this process?

a) 1.7

b) 2.5

c) 1.0

d) 1.5

12. If Cp=2.0,Cpu=1.5,Cpl=2.5 what will be the value of Cpk?

a) 2.5

b) 2.0

c) 1.5

d) 0

13. If Cpk=1.0 and Cp=2.0, what will be the actual fallout for the process in ppm?

a) 200

b) 2700

c) 1

d) 1350

14. Cpkmeasures the maximum of the two, Cpuand Cpl.

a) True

b) False

15. For the calculation of Cpkthe quality characteristic should have a lognormal distribution.

a) True

b) False