Six Sigma Green Belt- Describe how QFD fits into the overall DFSS process. Q2. What is interrelationship Digraph? Explain it with example . Find the area under the

Describe how QFD fits into the overall

 Six Sigma Green Belt


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Multiple Choices:

Q1. The primary purpose of a control chart is to:

a. Set Specifications and tolerances

b. Compare operations.

c. Determine the stability of a process.

d. Accept or reject a lot of material

Q2. When a control chart is used on a new process, capability can be assessed at which of the following times?

a. Before the chart is first started

b. After the first ten points are plotted

c. When the plotted points hug the centerline

d. After the process is shown to be in control

Q3. Precision is best described as:

a. A comparison to a known standard

b. The achievement of expected outgoing quality

c. The repeated consistency of results

d. The difference between an average measurement and the actual value

Q4. The overall ability of two or more operators to obtain consistent results repeatedly when measuring the same set of parts and using the same measuring equipment is the definition of:

a. Repeatability

b. Precision

c. Reproducibility

d. Accuracy

Q5. Which of the following conditions must be met for a process to be in a state of statistical control?

a. Most of the product out by the process is in specification.

b. All subgroup averages and rang are within control limits.

c. All variation has been completely removed

d. Previously optimal process settings are used.

Q6. Which of the following measures of dispersion is equal to the sum of deviations from the mean squared divided by the sample size?

a. Range

b. Standard deviation

c. Variance

d. Mode

Q7. An X and R chart is used to:

a. Indicate process variation

b. Specify design Limits

c. Interpret costs

d. Identify customer expectations

Q8. Which of the following is the most useful graphical tool for promoting and understanding the process of capability?

a. A flowchart

b. A histogram

c. An affinity diagram

d. An Ishikawa diagram

Q9. The type of chart that presents the value of items in descending order is a:

a. Histogram

b. Pareto chart

c. U chart

d. Cusum chart

Q10. Measures of which of the following provide attributes data?

a. Temperature in degrees

b. Attendance at meetings

c. Weight in pounds

d. Length in metric units

Q11. The fraction of nonconforming products is plotted on which of the following types of control chart?

a. P chart

b. U chart

c. Np chart

d. C chart

Q12. A cause and effect diagram is a useful tool for doing which of the following?

a. Determining the flow of a process

b. Detecting shifts in a process

c. Developing theories based on symptoms

d. Arranging theories by defect count

Q13. Which of the following statistics would best describe the central tendency of a sample of data?

a. Mode

b. Mean

c. Standard deviation

d. Range

Q14. Which of the following type of tools or techniques is considered qualitative?

a. Histogram

b. Frequency distributions

c. Pareto chart

d. Process observations

Q15. Out of the following which technique is most useful in narrowing issues and limiting discussion?

a. Brainstorming

b. Quality function deployment

c. Cause and effect analysis

d. Mutilating

Q16. In statistics, an estimation error that is persistent or systematic is called:

a. Bias

b. Sensitivity

c. Random

d. Shift

Q17. For a normal distribution, two standard deviation on each side of the mean would include what percentage of the total population:

a. 47%

b. 68%

c. 95%

d. 99%

Q18. If a distribution is normal, u=50 s=15, what percentage of data will be less than 30?

a. 59.18%

b. 40.82%

c. 9.18%

d. 1.33%

Q19. A company is receiving an unusually high number of returns from various customers. The first step in
investigating the problem would be to

a. Check the inspection records

b. Establish the correlation of the returns to shipments

c. Brainstorm the potential causes

d. Classify the returns by type and degree of serious

Q20. Which of the following is the best definition of a flow chart?

a. A diagram used to structure ideas into useful categories

b. An illustration used to analyze variation in a process

c. A picture used to separate steps of a process in sequential order

d. An analytical tool used to clarify opposing aspects of a desired change


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Q21. Which of the following activities would NOT contribute to the effective functioning of a team?

a. Eliminating unnecessary activities

b. Development team performance measures

c. Defining process in detail

d. Monitoring each member’s performance

Q22. What is the standard deviation of the population-10, 4, 16, 12, and 8?

a. 4.00

b. 4.47

c. 16.00

d. 20.00

Q23. Which of the following tools would be most appropriate for collecting data to study the symptoms of a problem?

a. Check sheet

b. Flow diagram

c. Force-field analysis

d. Activity network diagram

Q24. Which of the following measures is a sufficient statistic for the parameter u?

a. Median

b. Mid-range

c. Mean

d. Mode

Q25. Positional, cyclical, and temporal variations are most commonly analyzed in:

a. SPC charts

b. Multi-vari charts

c. Cause and effect diagram

d. Run charts

Q26. Which of the following describes the deming method for continuous improvement?

a. Cost of quality analysis

b. Process map

c. Tree Diagram

d. Plan-do-check-act cycle

Q27. In analysis of variance, which of the following distribution is the basis for determining whether the variance estimates are all from the same population?

a. Chi square

b. Students

c. Normal

d. F

Q28. Which of the following statement best describes the set of value of a random variable?

a. It is finite.

b. It is an interval

c. It can be discrete or continuous.

d. It can be tracked by using control charts or scatter plots.

Q29. Which of the following is the best description of randomization?

a. A technique used to increase the precision of an experiment

b. A means of assuring representative sampling

c. The repetition of an observation or measurement

d. The relationship between two or more variables

Q30. When the order of items is not important, which of the following method is used to determine the number of sets and subsets of items?

a. Combination

b. Permutation

c. Factorization

d. Simulation

Q31. Scatter diagrams are best described as:

a. Histograms.

b. Correlation analysis.

c. Pareto analysis.

d. Ishikawa diagrams.

Q32. A __________ is created to determine customers of a specific process.

a. Pareto chart

b. Flow diagram

c. Cause and effect diagram

d. Scatter diagram

Q33. A production line uses signs at specific points on the line to indicate when components or raw
materials need to be replenished. This practice is an example of:

a. Kanban

b. Poka-yake

c. Checkpoints

d. Hoshin

Q34. Which of the following is a good tool for planning cycle time reduction and concurrent operations?

a. A timeline

b. A Pareto diagram

c. An X and R chart

d. A PERT chart

Q35. Attribute and variable data are best described as which of the following?

a. Counted values measured values

b. Counted values visual features

c. Measured values counted values

d. Visual features counted values

Q36. All of the following are common ways for people to react to conflict except:

a. Competing

b. Collaborating

c. Avoiding

d. Sabotaging

Q37. A quality manager has chosen to survey customer satisfaction by taking samples based on the categories of frequency of use, categories of use, and demographic. This technique is known as

a. Random sampling

b. Data collection

c. Stratification

d. Customer classification

Q38. Which of the following actions is Not used to reduce process cycle time?

a. Analyzing current processes

b. Reducing queue times

c. Setting priorities

d. Implementing activity-based costing

Q39. A company’s accounts payable department is trying to reduce the time between receipt and payment of invoices and has recently completed a flowchart. Which of the following tool is the next to be used by them?

a. Fishbone diagram

b. Scatter diagram

c. Box and whisker plat

d. Histogram

Q40. In a manufacturing company, the machine shop is what kind of customer in relation to the Human Resource department?

a. Intermediate

b. Hidden

c. External

d. Internal

Q41. Describe how QFD fits into the overall DFSS process.

Q42. What is interrelationship Digraph? Explain it with example.

Q43. Find the area under the standard normal curve between +1.50 standard deviations and +2.50  standard deviations.

Q44. Define terms related to One-Way ANOVA and interpret their results & data plots.

Q45. Define & describe the use of Rational Sub grouping.

Q46. Suppose you are cooking steak for 100 people, & the current approval rating is 75% acceptable.You want to know the affect of different methods and approaches to see how the overall approval or “yield” is affected. By using the Full Factorial method explain how the overall approval or “yield” is affected.

Q47. Interpret Control Charts? Distinguish between common & special causes using rules for
determining stastical control




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