Measure (GB2)

This sample paper will check your knowledge on Measure phase for LSS Green Belt

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1. The design specification for a cap diameter is 2 ± 0.05 cm. The diameter data follows normal distribution with mean of 2.02 cm and standard deviation of 0.01 cm. Calculate Cp, Cpk and give appropriate recommendation

Cp=1.67, Cpk=1; Process mean to be shifted to target

Cp=0.33, Cpk=0.2; Process mean to be shifted to target

Cp=0.33, Cpk=0.33; Variation to be reduced

Cp=1.67, Cpk=1; Variation to be reduced

2. The purpose of operational definition is

to provide a single, agreed upon meaning of the CTQ to all the stakeholders

to ensure reliability and consistency of measurement

to provide a clear and understandable description of what is to be observed and measured

All the above

3. 100 transactions were inspected, 20 errors were found in 15 transactions. What is DPU?

0.02

2

1.33

0.2

4. Which of the following statements is FALSE?

Sigma level can be calculated for both discrete and continuous data

If standard deviation decreases, Sigma level increases

Sigma level can be converted to a corresponding DPMO

All processes should operate at a six sigma level

5. Quality team at an online retailer checks images and classifies them as “OK” or “NOT OK”. Although 70% of the images are handled by automation, 30% images are still checked manually which the system fails to classify correctly. Which of the following is an appropriate method to validate the manual measurement system?

Focus on the operational definition

Logical validation

Gage Repeatability and Reproducibility

Attribute Agreement Analysis

6. All the statements given below are false, EXCEPT

Cpk is always equal to or greater than Cp

If the Cpk value becomes zero, then the process average is at one of the specification limits

The Cp and Cpk values will be 2 if the process is perfectly centered

In both Cp and Cpk, the lower the value, higher the performance level

7. During frisking at airports, the metal detectors are passed over the metal belt first. This is an example of:

Logical validation

Repeatability

Attribute agreement analysis

Gage R & R

8. An appraiser provides consistent scores every time he makes a measurement. All other appraisers show similar performance. However many of them do not agree with the standard answer. The issue is with the:

Appraiser Repeatability

Appraiser Accuracy

Appraiser Reproducibility

Team repeatability

9. As per the SLA, all complaints should be resolved within 8 hours. Currently the average resolution time is 4.57 hours and standard deviation is 0.8 hours. What is DPMO?

4.29

9.0

5.97

None of the above

10. DPMO can be calculated from:

Continuous data following normal distribution, provided specifications are known

Defects data provided OFE is known

Defective data

All the above

11. The FTY’s of four sequential process steps are 0.8, 0.91, 0.90, 0.99. What is the RTY and Zst respectively?

RTY = 0.6486; Zst = 0.38

RTY = 0.99; Zst = 3.83

RTY = 0.6486; Zst = 1.88

RTY = 0.7920; Zst = 2.31

12. Which of the following process has the highest Capability Index (Cp)?

Process A - USL = 30, LSL = 20, Mean = 20, Standard Deviation = 1
Process B - USL = 30, LSL = 20, Mean = 15, Standard Deviation = 2
Process C - USL = 31, LSL = 21, Mean = 25, Standard Deviation = 1

Process A

Process B

Process C

Both Process A and C

13. “Higher the better” applies to all the following, EXCEPT

Sigma level

Cp

DPU

Yield

Benchmark Six Sigma - War Room

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