cssgb questions rev01

Certified Sixsigma Greenbelt Handbook Practice Questions

(Selected from the past ASQ Exam questions and Study guide to match the BOK and Cognitive levels)

1. The following is a sample data set. 10 8 8 6 5 What is the variance of this data set? a. 3.0 b. 3.8 c. 7.3 d. 7.4 Ref: CCT Study Guide Q7

2. An auditor should use a histogram in a quality audit to do which of the following?

a) Provide objective evidence that the auditee uses statistical process control (SPC) b) Expose patterns that are normally difficult to detect c) Interpret data for a trend chart d) Create a stratified tally diagram

Ref: CBA Study Guide Q2

3. Comparing how a process is actually performed against the documented work instruction for that process is an example of which of the following techniques?

a. Quantitative b. Qualitative c. Statistical d. Random sampling

Ref: CBA Study Guide Q4

4. Attribute sampling should be used when

a. the data are measurements in metric units. b. a yes-or-no decision is to be made. c. the population has variability. d. a multi-stage sampling plan is needed.

Ref: CHA Study Guide Q10. 5. Scatter diagrams are best described as a. histograms. b. correlation analysis. c. Pareto analysis. d. Ishikawa diagrams. Ref: CMQOE Study Guide Q9

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6. In which of the following diagrams does the input variable X have the highest positive correlation with the output variable Y?

Ref: CMQOE Study Guide Q13 8. If data are plotted over time, the resulting chart will be a (A) run chart (B) histogram (C) Pareto chart (D) Poisson distribution Ref: Detailed CMQOE Study Guide Q5 9. To determine who are or might be customers for a specific process, it would be most useful to create a (A) Pareto chart (B) flow diagram (C) cause and effect diagram (D) scatter diagram Ref: Detailed CMQOE Study Guide Q13 10. 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-yoke (C) checkpoints (D) hoshin Ref: Detailed CMQOE Study Guide Q16

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11. Which of the following is a good tool for planning cycletime reduction and concurrent operations? (A) A timeline (B) A Pareto diagram (C) An X and R chart (D) A PERT chart Ref: Detailed CMQOE Study Guide Q23 12. Attribute and variable data are best described as which of the following? Attribute Variable (A) Counted values Measured values (B) Counted values Visual features (C) Measured values Counted values (D) Visual features Counted values Ref: Detailed CMQOE Study Guide Q28 13. All of the following are common ways for people to react to conflict EXCEPT (A) competing (B) collaborating (C) avoiding (D) sabotaging Ref: Detailed CMQOE Study Guide Q29 14. A quality manager has chosen to survey customer satisfaction by taking samples based on the categories of frequency of use, categories of use, and demographics. This technique is known as (A) random sampling (B) data collection (C) stratification (D) customer classification Ref: Detailed CMQOE Study Guide Q50 15. 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 Ref: Detailed CMQOE Study Guide Q59 16. 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 tools would be the best for them to use next? (A) Fishbone diagram (B) Scatter diagram (C) Box and whisker plot

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(D) Histogram Ref: Detailed CMQOE Study Guide Q60 17. 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 Ref: Detailed CMQOE Study Guide Q66 18. The primary purpose of a project charter is to (A) subdivide the project into smaller, more manageable components (B) provide management with a tool for selecting a project that addresses business needs (C) provide management with a tool to ensure that project deadlines are met (D) provide the project manager with authority to apply organizational resources to project activities Ref: Detailed CMQOE Study Guide Q71

19. Sample selection of parts for inspection must be selected at random to ensure

a) a minimum sample size. b) the probability of not rejecting the lot. c) the probability of accepting the lot. d) finding typical characteristics of the lot.

Ref: CQI Study Guide Q12

20. Which of the following are bases for establishing calibration intervals?

I. Stability II. Purpose III. Degree of usage

a. I and II only b. I and III only c. II and III only d. I, II, and III


21. In a normal curve, approximately what percentage of the area is included within 3 standard deviations of the mean?

a. 50.0% b. 66.6% c. 95.0%

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d. 99.7%


22. Specification limits are derived from which of the following?

a. Process capability studies b. Process control charts c. Customer requirements d. Historical data


23. 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.

Ref: CQI Study Guide Q19 24. 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 Ref: CQI Pdf Study Guide Q02 25. 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 Ref: CQI Pdf Study Guide Q14 26. 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 Ref: CQI Pdf Study Guide Q39 27. Which of the following conditions must be met for a Process to be in a state of statistical control?

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(A) Most of the product output by the process is in specification. (B) All subgroup averages and ranges are within control limits. (C) All variation has been completely removed. (D) Previously optimal process settings are used. Ref: CQI Pdf Study Guide Q43 28. 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 Ref: CQI Pdf Study Guide Q44 29. An X and R chart is used to (A) indicate process variation (B) specify design limits (C) interpret costs (D) identify customer expectations Ref: CQI Pdf Study Guide Q48

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

a. A flowchart b. A histogram c. An affinity diagram d. An Ishikawa diagram

Ref: CQA Study Guide Q5

31. 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


32. 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


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33. 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

Ref: CQA Study Guide Q23 34. The fraction of nonconforming products is plotted on which of the following types of control charts? (A) p chart (B) u chart (C) np chart (D) c chart Ref: CQA pdf Study Guide Q07 35. 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 Ref: CQA pdf Study Guide Q13 36. Which of the following types of tools or techniques is considered qualitative? (A) Histograms (B) Frequency distributions (C) Pareto charts (D) Process observations Ref: CQA pdf Study Guide Q26

37. The process information shown in the graph above is indicative of a (A) cycle (B) run (C) trend

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(D) shift Ref: CQA pdf Study Guide Q55 38. Which of the following techniques is most useful in narrowing issues and limiting discussion? (A) Brainstorming (B) Quality function deployment (C) Cause and effect analysis (D) Multivoting Ref: CSQE pdf Study Guide Q03 39. Quality function deployment (QFD) is a methodology for (A) removing bugs from code (B) identifying and defining key customer demands (C) measuring the reliability of a software product (D) training employees in quality issues Ref: CSQE pdf Study Guide Q24

40. Which of the following is the critical path in the activity network above? (A) A, B, C, F, G, I, J (B) A, B, D, E, F, G, I, J (C) A, B, D, E, F, H, I, J (D) A, K, L, M, J Ref: CSQE pdf Study Guide Q25

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41. On the basis of the control chart above, which of the following statements is true? (A) Components 1, 2, 3, and 5 should be reinspected because they are below the mean. (B) Only component 4 should be investigated because it is closest to the upper control limit. (C) Components 4, 6, 7, 8 and 9 should be investigated because they are above the mean. (D) No action is required; all data points are within acceptable statistical variance. Ref: CSQE pdf Study Guide Q31 42. A customer satisfaction survey used the following rating scale: 1 = very satisfied 2 = satisfied 3 = neutral 4 = dissatisfied 5 = very dissatisfied This is an example of which of the following measurement scales? (A) Nominal (B) Ordinal (C) Ratio (D) Interval Ref: CSQE pdf Study Guide Q38 43. Which of the following techniques is used in identifying underlying problems? (A) Cause and effect analysis (B) Prioritization matrix (C) Force field analysis (D) Pareto analysis

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Ref: CSQE pdf Study Guide Q54

44. For a normal distribution, two standard deviations on each side of the mean would include what percentage of the total population?

a. 47% b. 68% c. 95% d. 99%

Ref: CSSBB Study Guide Q01

45. In measurement system analysis, which of the following pairs of data measures is used to determine total variance?

a. Process variance and reproducibility b. Noise system and repeatability c. Measurement variance and process variance d. System variance and bias


46. Process data being used in the initial set-up of a process are assumed to have a normal distribution. If the nominal (target) is set at the center of the distribution, and the specification limits are set at ± 3 from the center, the Cpk is equal to

a. -0.25 b. 1.00 c. 1.33 d. 1.67


47. A green belt is going to monitor the number of defects on different size samples. Which of the following control charts would be most appropriate?

a. u b. np c. c d. p


48. Correction, over-production, inventory, and motion are all examples of

a. waste b. 5S target areas c. noise d. value-added activities


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49. The primary factor in the successful implementation of six sigma is to have

a. the necessary resources b. the support/leadership of top management c. explicit customer requirements d. a comprehensive training program


50. Which of the following types of variation is LEAST likely to occur in sequential repetitions of a process over a short period of time?

a. Cyclical b. Positional c. Temporal d. Seasonal


51. The primary reason that most companies implement six sigma is to

a. reduce defects b. improve processes c. improve profit d. increase customer satisfaction


52. The term used to describe the risk of a Type I error in a test of hypotheses is

a. power b. confidence level c. level of significance d. beta risk


53. One characteristic of attributes data is that it is always

a. continuous b. discrete c. expensive to collect d. read from a scale of measurement


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54. Which of the following tests may be used to determine whether a sample comes from a population with an exponential distribution?

a. t b. F c. Chi-square d. ANOVA

Ref: CQE Study Guide Q02

55. Which of the following tools are appropriate for a quality engineer to use in qualifying a process that has variable data?

I. An and R control chart II. A histogram III. A c chart IV. A p chart

a. I and II only b. II and III only c. III and IV only d. I, II, and IV only


56. The correlation coefficient for the length and weight of units made by a process is determined to be 0.27. If the process were adjusted to reduce the weight of each unit by 0.5 ounce, the correlation coefficient of the length and weight of the units made by the new process would be equal to

a. 0.50 b. 0.27 c. 0.23 d. -0.23


57. A form, in either diagram or table format, that is prepared in advance for recording data is known as a

a. cause-and-effect diagram b. Pareto chart c. flowchart d. check sheet


58. A major drawback of using histograms in process control is that they

a. do not readily account for the factor of time

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b. are relatively difficult to construct and interpret c. require too many data points d. require too many intervals


59. Which of the following tools would be of the greatest use for finding the most efficient path and realistic schedule for the completion of a project?

a. Interrelationship digraph b. Activity network diagram c. Tree diagram d. Affinity diagram


60. A control plan is designed to do which of the following?

a. Supplement information contained in operator instructions b. Support the production scheduling system c. Provide a documented system for controlling processes d. Provide a method for tracking the design review process


61. To determine the average number of nonconforming parts over time, which of the following attribute control charts would be most appropriate?

a. c chart b. np chart c. p chart d. u chart

Ref: CQE Study Guide Q21 62. Which of the following techniques is most appropriate for generating continuous improvement ideas? (A) Tree diagram (B) Brainstorming (C) Prioritization matrix (D) Interrelationship digraph Ref: CQE pdf Study Guide Q01 63. Which of the following tools is used extensively in quality function deployment (QFD)? (A) Affinity diagram (B) Matrix diagram (C) Cause and effect diagram (D) Activity network diagram Ref: CQE pdf Study Guide Q03

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64. Which of the following tools is most likely to be used to organize a list of ideas generated during a brainstorming session? (A) Activity network diagram (B) Affinity diagram (C) Histogram (D) Process control chart Ref: CQE pdf Study Guide Q10 65. Which of the following tools would be most appropriate for collecting data to study the symptoms of a problem? (A) A check sheet (B) A flow diagram (C) A force field analysis (D) An activity network diagram Ref: CQE pdf Study Guide Q11 66. Kaizen is defined as (A) re-engineering (B) lean manufacturing (C) continuous improvement (D) error-proofing Ref: CQE pdf Study Guide Q15 67. Legal requirements specify that a bottled product must contain no less than the volume printed on the label. A bottling company wants to reduce the amount of overfilled bottles.

On the basis of the data above, what is the most effective strategy to accomplish this task? (A) Decrease the target fill volume only (B) Decrease the target fill variation only (C) First decrease the target fill volume, then decrease the target fill variation (D) First decrease the target fill variation, then decrease the target fill volume Ref: CQE pdf Study Guide Q18

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69. The LEAST informative of the four measurement scales is the (A) ratio (B) nominal (C) ordinal (D) interval Ref: CQE pdf Study Guide Q20 70. Which of the following can be used to determine the goodness-of-fit of a distribution to a data set? (A) t test (B) ANOVA (C) F test (D) Chi square test Ref: CQE pdf Study Guide Q21 71. When σ = 10, what sample size is needed to specify a 95% confidence interval of ±3 units for the mean? (A) 7 (B) 11 (C) 32 (D) 43 Ref: CQE pdf Study Guide Q22 73. A process capability analysis is NOT used to (A) determine the ability of a process to meet specifications (B) maintain a process in a state of statistical control (C) establish new specifications (D) prioritize competing processes Ref: CQE pdf Study Guide e Q31 74. A type of line graph used to assess the stability of a process is called a (A) control chart (B) Pareto chart (C) check sheet (D) cause and effect diagram Ref: CQE pdf Study Guide Q37 75. A process produces nonconformities according to a Poisson distribution. If the mean of the nonconformities is 25, what is the standard deviation? (A) 2.5 (B) 5.0 (C) 12.5 (D) 25.0 Ref: CQE pdf Study Guide Q38

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76. Five six-sided dice are rolled together 100 times. Two histograms are constructed: one for the 500 individual results and one for the 100 averages of five results. In this situation, the individual results follow a uniform distribution, while the averages follow which of the following distributions? (A) Normal (B) Student’ s t (C) Binomial (D) Uniform Ref: CQE pdf Study Guide Q40 77. A calibrated micrometer was used to take 10 replicated measures of a reference standard. If X m = 0.073, and the true value of the reference standard is 0.075, what is the bias of the micrometer? (A) 0.001 (B) 0.002 (C) 0.073 (D) 0.075 Ref: CQE pdf Study Guide Q42 78. The power of a test for the difference between means is measured by (A) α (B) 1 - α (C) β (D) 1 - β Ref: CQE pdf Study Guide Q44 79. A process is stable and its output is normally distributed. The process has a specification of 16.73 ± 0.01. What is the maximum process standard deviation if the Cp must be ≥ 1.5 ? (A) 0.0011 (B) 0.0022 (C) 0.0041 (D) 0.0133 Ref: CQE pdf Study Guide Q47

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81. Which of the following figures is labeled correctly?

Ref: CQE pdf Study Guide Q27 82. A quality improvement team that was assigned to decrease the number of pinholes in milk jugs presented the following Pareto diagrams during a management briefing.

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The best interpretation of these data is that the project was (A) not successful in reducing pinholes, since causes B, C, and D now occur more frequently than cause A (B) successful in removing the primary cause of pinholes, and no further improvements are necessary (C) successful, and tracking pinholes by cause A is no longer necessary (D) successful in decreasing pinholes, and the team should work on cause B to further improve the process Ref: CQE pdf Study Guide Q51 84. The main advantage of a matrix diagram is that it (A) displays all the possible causes related to a problem (B) displays the strength of relationships between each paired combination of variables (C) identifies, analyzes, and classifies the cause and effect relationships that exist among all critical issues (D) identifies a sequence of actions and materials entering a process Ref: CQE pdf Study Guide Q55 85. Poka-yoke is best defined as (A) improving machine efficiency

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(B) reducing field failures to virtually zero (C) capturing the voice of the customer (D) preventing controllable defects Ref: CQE pdf Study Guide Q56 86. Which of the following describes the 95% confidence interval of a 20% absentee rate in a department with 30 people? (A) 6% to 34% (B) 8% to 32% (C) 13% to 27% (D) 17% to 23% Ref: CSSBB pdf Study guide Q20. 87. Which of the following are needed to calculate the process capability index, Cp? (A) The specification limits and the mean (B) The specification limits and σ^ (Sigma Cap) (C) The process mean and σ^ (Sigma Cap) (D) The upper and lower specification limits Ref: CQE pdf Study Guide Q63 88. Repeatability and reproducibility are terms that operationally define (A) bias (B) accuracy (C) discrimination (D) precision Ref: CQE pdf Study Guide Q65 89. A method that classifies data without significantly reducing accuracy or precision is known as (A) bias adjustment (B) statistical efficiency (C) blocking (D) coding Ref: CQE pdf Study Guide Q66 90. If a process has a variance of 4 units and a specification of 96 ± 4, what is the process performance index (Pp)? (A) 0.33 (B) 0.66 (C) 1.00 (D) 1.50 Ref: CQE pdf Study Guide Q72

92. If a histogram has a distribution that is bimodal this indicates that the

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a. process is in control b. distribution is abnormal c. data collected is accurate d. data has two points

Ref: CQIA Study Guide Q03

93. Which of the following best describes how an affinity diagram is used?

a. Grasping organizational performance relative to contrasting data b. Prioritizing data from most significant to least significant c. Grouping ideas that are created during brainstorming d. Identifying when a process is in control


94. Warranty claims are classified in which of the following cost of quality groups?

a. Internal failure b. External failure c. Appraisal d. Prevention


95. At what stage of the problem-solving process would a team most likely use a cause-effect diagram?

e. Description of the process associated with the problem f. Definition of the problem and its scope g. Organization of possible problem causes h. Collection of data to identify actual causes

Ref: CQT Study Guide Q01

96. Steel bars are cut to cylindrical shafts by means of a lathe. The diameter and allowable tolerance of the shaft is 2.000 ± .001 inch. A control chart is used to monitor the quality level of the process. Which of the following plots on the control chart might indicate a problem of wear on the lathe?

a. The diameter of a single shaft above 2.001 inch b. The diameter of a single shaft below 1.999 inch c. An apparent increasing trend in the shaft diameters d. Erratic in-tolerance or out-of-tolerance diameter measurements

Ref: CQT Study Guide Q03

97. A sample consists of one or more units of product drawn from a lot or batch on the basis of

a. defect of the product

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b. random selection c. size of the product d. when the inspection process was completed

Ref: CQT Study Guide Q08 98. What is the percent yield for a normally distributed process in which the item length specification is 5.750 ± 0.004, X is 5.752, and the standard deviation is 0.002 ? (A) 15.73% (B) 19.15% (C) 47.72% (D) 83.99% Ref: CQT pdf Study Guide Q09 99. In preparation for construction of a cause and effect diagram, it is important to (A) plot separate charts for each source (B) focus only on what makes things go wrong (C) record everything people suggest (D) validate possible root causes Ref: CQT pdf Study Guide Q10 100. A quality technician uses a c chart to monitor the number of defects in a square foot of material. After the initial startup period, the mean number of defects is calculated at 13.5. What should the control limits be for the c chart? LCL UCL (A) 0.00 54.00 (B) 0.00 27.00 (C) 2.48 24.52 (D) 9.83 17.17 Ref: CQT pdf Study Guide Q11

101. The shape of the distribution above is best described as (A) normal (B) multi-modal (C) positively skewed (D) negatively skewed Ref: CQT pdf Study Guide Q12 102. If a distribution is normal, with µ= 50 and σ = 15, what

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percentage of data will be less than 30 ? (A) 59.18% (B) 40.82% (C) 9.18% (D) 1.33% Ref: CQT pdf Study Guide Q18 103. 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 seriousn Ref: CQT pdf Study Guide Q21 104. Which of the following activities would NOT contribute to the effective functioning of a team? (A) Eliminating unnecessary activities (B) Developing team performance measures (C) Defining processes in detail (D) Monitoring each member’s performance Ref: CQT pdf Study Guide Q27 105. 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 Ref: CQT pdf Study Guide Q28 106. What is the standard deviation of the population below? 10, 4, 16, 12, 8 (A) 4.00 (B) 4.47 (C) 16.00 (D) 20.00 Ref: CQT pdf Study Guide Q29 107. The extent to which an instrument replicates its result when measurements are taken repeatedly on the same unit is called (A) real bias (B) precision (C) accuracy (D) true value

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Ref: CQT pdf Study Guide Q34

109. On the basis of the control chart sample above, what is the upper control limit (UCL) for the average? (A) 1.23 (B) 3.21 (C) 3.43 (D) 7.25 Ref: CQT pdf Study Guide Q40 110. Which of the following measures is a sufficient statistic for the parameter µ? (A) Median (B) Mid-range (C) Mean (D) Mode Ref: CQT pdf Study Guide Q41 111. What is the recommended minimum number of subgroups necessary to calculate the limits for a control chart? (A) 10 (B) 15 (C) 25 (D) 35 Ref: CQT pdf Study Guide Q44

112. The distribution above most likely implies that the

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elements measured represent (A) the extremes of a single process (B) a collection of two processes with normal distributions (C) random variations (D) the modes of a single process Ref: CQT pdf Study Guide Q45 113. 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 Ref: CQT pdf Study Guide Q46 114. Which of the following is the formula for calculating the number of permutations of x units taken y at a time?

Ref: CQT pdf Study Guide Q48

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

a. Chi square b. Student's t c. Normal d. F

Ref: CRE Study Guide Q05 116. Which of the following statements best describes the set of all values of a random variable? (A) It is finite. (B) It is an interval. (C) It can be discrete or continuous.

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(D) It can be tracked by using control charts or scatter plots. Ref: CRE pdf Study Guide Q14 117. 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 Ref: CRE pdf Study Guide Q15 118. When the order of items is not important, which of the following is the method to use to determine the number of sets and subsets of items? (A) Combination (B) Permutation (C) Factorization (D) Simulation Ref: CRE pdf Study Guide Q22 119. A fair coin is tossed 10 times. What are the expected mean and variance of the number of heads?

Mean Variance (A) 0.5 0.025 (B) 5.0 2.500 (C) 5.0 5.000 (D) 10.0 5.000 Ref: CRE pdf Study Guide Q25 120. In statistics, an estimation error that is persistent or systematic is called (A) bias (B) sensitivity (C) random (D) shift Ref: CRE pdf Study Guide Q43 121. Which of the following is the most effective technique for prioritizing critical factors for problem-solving? (A) Venn diagram (B) Scatter diagram (C) Pareto diagram (D) Cause and effect diagram Ref: CRE pdf Study Guide Q52

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122. Which of the following tools should be used when a team is generating and prioritizing a list of options that include highly controversial issues? (A) Brainstorming (B) Affinity diagrams (C) Nominal group technique (D) 5 whys Ref: CSSBB pdf Study guide Q01 124. 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 Ref: CSSBB pdf Study guide Q03 125. Positional, cyclical, and temporal variations are most commonly analyzed in (A) SPC charts (B) multi-vari charts (C) cause and effect diagrams (D) run charts Ref: CSSBB pdf Study guide Q04 127. Which of the following is most important in evaluating and understanding design intent? (A) Identifying the functional requirement (B) Brainstorming failure modes (C) Conducting computer simulations (D) Developing FMEA Ref: CSSBB pdf Study guide Q07 128. Which of the following activities is value-added? (A) Setup (B) Process (C) Storage (D) Inspection Ref: CSSBB pdf Study guide Q09 129. A Green belt plans to test the performance of workers before and after training. Which of the following hypothesis tests should be used to determine whether the training actually improved the workers’ performance? (A) 2-sample z test (B) 2-sample t test (C) Paired t test (D) F test

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Ref: CSSBB pdf Study guide Q10- minor change 130. The purpose of using control charts is to determine (A) if the process is performing within specifications (B) the process capability (C) how to re-create the process (D) the cause of nonconformities Ref: CSSBB pdf Study guide Q11 132. Which of the following is defined as continuous, incremental improvement? (A) Kanban (B) Kaizen (C) JIT (D) Kaikaku Ref: CSSBB pdf Study guide Q13 133. Which of the following is the best way to enhance the long-term availability of a machine? (A) Machine repair (B) Total productive maintenance (C) Computerized SPC systems (D) Increased operator training Ref: CSSBB pdf Study guide Q16 134. Typically, which of the following activities is done earliest in the formation of a project team? (A) Select the team (B) Identify the objective (C) Identify the sponsor (D) Allocate the resources Ref: CSSBB pdf Study guide Q17 135. A Green belt is developing a failure mode and effects analysis (FMEA) for the hamburger preparation station in a fast-food restaurant. The following ratings were developed for the low-heat temperature failure mode. Severity = 9 Occurrence = 2 Detection = 1 What is the risk priority number (RPN) for this FMEA? (A) 4 (B) 6 (C) 12 (D) 18 Ref: CSSBB pdf Study guide Q18- minor change 136. Which of the following statements is true about the theory of constraints?

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(A) It views a system in terms of discrete processes (B) Most constraints are physical (C) Most constraints are the result of policies (D) It focuses on continuous improvement Ref: CSSBB pdf Study guide Q19. 139. A measurement system analysis is designed to assess the statistical properties of (A) gage variation (B) process performance (C) process stability (D) engineering tolerances Ref: CSSBB pdf Study guide Q23. 140. For a process, X double bar = 35.0 and σ = 5.00. If the subgroup size is n = 5, what is the value for the upper control limit for the process? (A) 37.24 (B) 37.89 (C) 41.71 (D) 52.50 Ref: CSSBB pdf Study guide Q25. 142. A six sigma project to reduce billing statement expenses has shown the need to hire two additional mailroom clerks. Based on this information, which of the following metrics should be used to measure the financial benefits of the project? (A) Cost of poor quality (B) Return on investment (C) Net present value (D) Internal rate of return Ref: CSSBB pdf Study guide Q27. 144. Which of the following is a component of a visual factory? (A) Product specifications (B) Zero defect policies (C) Just-in-time policies (D) Equipment service manuals Ref: CSSBB pdf Study guide Q30. 146. Which of the following is the best technique for improving the precision of a designed experiment when the experimental material is not homogeneous? (A) Blocking (B) Confounding (C) Randomization (D) Fractionalizing

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Ref: CSSBB pdf Study guide Q32. 147. A six sigma team has been formed to improve an existing process. Which of the following tools should the team use first to gain a clear understanding of the current process? (A) Flowchart (B) Pareto chart (C) Process FMEA (D) Latin square DOE Ref: CSSBB pdf Study guide Q34. 151. A company’s accounts payable department is trying to reduce the time between receipt and payment of invoices. If the team has just completed a flowchart of the process and identified the critical steps, which of the following tools should be used next? (A) Fishbone diagram (B) Scatter diagram (C) Box and whisker plot (D) Histogram Ref: CSSBB pdf Study guide Q39. 152. When a team consists of five black belts and eight quality engineers, how many unique meetings could be held consisting of one black belt and two quality engineers? (A) 40 (B) 80 (C) 140 (D) 280 Ref: CSSBB pdf Study guide Q40. 155. A six sigma team has been chartered to improve the way in which a company takes orders for its products. Which of the following tools should the team use to determine all of the potential pitfalls and the actual defects that occur? (A) Process failure mode and effects analysis (B) Process map (C) Design for six sigma (D) Supplier input process output control Ref: CSSBB pdf Study guide Q46. 156. According to Juran, anyone is a customer of a product or service if that person (A) purchases it (B) uses it (C) is affected by it (D) produces it

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Ref: CSSBB pdf Study guide Q47. 157. For an F-test to be inferentially valid, all of the following assumptions must be true EXCEPT the (A) populations must be discrete distributions (B) populations must be normally distributed (C) samples must be independent (D) samples must be randomly selected from the population Ref: CSSBB pdf Study guide Q49. 158. “Forming, Storming, Norming, and Performing” are terms that describe (A) process variation reduction and improvement phases (B) root cause identification and corrective action (C) stages of team growth (D) steps of the brainstorming process Ref: CSSBB pdf Study guide Q51. 159. The process of having a six sigma team develop a problem statement helps the team (A) agree on key dates associated with completing major project phases (B) achieve consensus and ownership of the process (C) determine solutions (D) determine how often it should meet Ref: CSSBB pdf Study guide Q54. 160. Which of the following is an element of standard work? (A) Takt time (B) Product cost (C) Product value (D) Maximum inventory Ref: CSSBB pdf Study guide Q55. 161. An important aspect of data collection is that the data collector should (A) determine the dispersion of the data (B) know how the data are to be used (C) use a control chart to analyze the data (D) use a stratified sampling plan Ref: CSSBB pdf Study guide Q56. 163. Which of the following charts plots the mean of a set of values and recalculates the mean with each new value? (A) Moving range (B) Moving average (C) X and s (D) c

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Ref: CSSBB pdf Study guide Q58. 164. In order for a problem to be solved correctly, which of the following must occur first? (A) The problem must be defined. (B) Relevant data must be gathered. (C) The measurement system must be validated. (D) The process must be mapped. Ref: CSSBB pdf Study guide Q60. 165. In comparison to a full-factorial design of experiment (DOE), a traditional, one-at-a-time approach will (A) miss interactions (B) gain efficiencies (C) save time (D) cost less Ref: CSSBB pdf Study guide Q61. 167. Which of the following techniques is NOT effective when a team leader is giving feedback to the team? (A) Describing the behavior in context (B) Describing the reasons for giving feedback (C) Giving feedback when it is convenient (D) Providing actionable guidance Ref: CSSBB pdf Study guide Q64. 168. Which of the following methods is used to develop an exhaustive list of ideas about a subject? (A) Benchmarking (B) Brainstorming (C) Goal-setting (D) Problem-solving Ref: CSSBB pdf Study guide Q66. 169. Which of the following techniques would help increase process stability when the cause of variation is a cluttered work station? (A) 5S (B) SMED (C) Preventive maintenance (D) Visual factory Ref: CSSBB pdf Study guide Q67. 170. Which of the following tools is commonly used in the define phase of a project? (A) Affinity diagram (B) Control chart (C) Failure mode and effects analysis

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(D) Data collection checklist Ref: CSSBB pdf Study guide Q69. 172. Which of the following best describes internal failure costs? (A) The economic costs associated with a catastrophic failure of an internal subsystem. (B) The unavoidable quality system costs associated with the production of any product or service. (C) The opposite of external failure costs. (D) The costs resulting from a nonconformance detected before a product or service is provided. Ref: CSSBB pdf Study guide Q71. 173. According to Juran, when a major quality improvement project is launched, which of the following describes the desired change in performance level? (A) Six sigma (B) Continuous (C) Breakthrough (D) Sporadic Ref: CSSBB pdf Study guide Q72. 174. According to Deming, which of the following is NOT a key element of quality leadership? (A) Established organizational goals to meet or exceed customer needs (B) The use of displays and awards to promote employee motivation (C) Continual education and training that elevate the level of technical and professional expertise (D) Elimination of barriers and distrust to create an organizational culture that fosters teamwork Ref: CSSBB pdf Study guide Q73.

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