Download Kizen Six Sigma Practice Exam and more Exams Technology in PDF only on Docsity!
Question 1. Which of the following best defines Kaizen? A) A one‑time large capital investment project B) Continuous incremental improvement involving all employees C) A method for eliminating all waste in a single step D) A technique for rapid product design Answer: B Explanation: Kaizen means “change for the better” and focuses on small, ongoing improvements made by everyone in the organization. Question 2. In the Lean philosophy, which of the following is NOT considered one of the eight wastes (Muda)? A) Overproduction B) Waiting C) Standardization D) Motion Answer: C Explanation: Standardization is a Lean tool, not a waste. The eight wastes are overproduction, inventory, waiting, non‑utilized talent, transportation, motion, rework/correction, and over‑processing. Question 3. The primary purpose of a Kaizen Blitz (or Kaizen Event) is to: A) Conduct a long‑term strategic planning session B) Implement a rapid, focused improvement over a few days C) Replace all existing equipment with new technology D) Perform a complete redesign of the organization’s mission
Answer: B Explanation: Kaizen Blitzes are short, intensive events (typically 3‑5 days) aimed at achieving quick wins on a specific process. Question 4. Which of the following best describes the “Sort” step in the 5S methodology? A) Arranging tools in order of frequency of use B) Removing unnecessary items from the workplace C) Cleaning the work area daily D) Establishing standard operating procedures Answer: B Explanation: “Sort” (Seiri) focuses on eliminating items that are not needed, keeping only what is essential. Question 5. In the 5S step “Set in Order,” the main goal is to: A) Eliminate all sources of waste B) Organize tools and materials so they are easy to locate and use C) Conduct regular employee training sessions D) Perform statistical analysis of process data Answer: B Explanation: “Set in Order” (Seiton) arranges necessary items for easy access, reducing motion waste. Question 6. Which of the following is a typical outcome of a successful Kaizen event?
Answer: B Explanation: Overproduction creates excess inventory and ties up resources, representing a key form of waste. Question 9. In Lean terminology, “Non‑Utilized Talent” refers to: A) Employees who are not trained in the latest software B) The underuse of employee skills, ideas, and creativity C) Workers who are absent frequently D) Overstaffing in a production line Answer: B Explanation: This waste highlights the failure to engage employees in problem‑solving and improvement activities. Question 10. Which of the following best illustrates “Transportation” waste? A) Moving parts between two distant workstations unnecessarily B) Using a higher‑grade material than required C) Performing a quality inspection twice on the same item D) Storing raw materials for an extended period Answer: A Explanation: Transportation waste is any unnecessary movement of materials, products, or information. Question 11. Six Sigma aims to achieve a defect rate of 3.4 DPMO, which corresponds to: A) Six standard deviations between the mean and the nearest specification limit
B) Six standard deviations between the mean and the farthest specification limit C) Six standard deviations between the mean and the nearest specification limit after a 1.5σ shift D) Six standard deviations between the mean and the nearest specification limit without any shift Answer: C Explanation: The 3.4 DPMO level assumes a 1.5σ shift in the process mean, resulting in a 6σ performance relative to the specification limits. Question 12. Who is credited with the “Plan‑Do‑Check‑Act” (PDCA) cycle? A) W. Edwards Deming B) Joseph Juran C) Philip Crosby D) Kaoru Ishikawa Answer: A Explanation: Deming popularized the PDCA cycle as a core component of continuous improvement. Question 13. In Six Sigma, the “Champion” is primarily responsible for: A) Performing statistical analyses on data sets B) Providing resources, removing barriers, and aligning projects with business goals C) Leading day‑to‑day project activities D) Conducting training for Green Belts Answer: B
D) RTY (Rolled Throughput Yield) Answer: A Explanation: DPU counts total defects divided by the number of units inspected. Question 17. If a process produces 2 defects per 10,000 opportunities, its DPMO is: A) 2 B) 20 C) 200 D) 2000 Answer: C Explanation: DPMO = (Defects ÷ Opportunities) × 1,000,000 = (2 ÷ 10,000) × 1,000,000 = 200. Question 18. First Time Yield (FTY) differs from Rolled Throughput Yield (RTY) in that: A) FTY accounts for rework, while RTY does not B) RTY multiplies yields of each step, while FTY looks at the overall process only C) FTY is used only for attribute data, RTY only for variable data D) RTY is calculated before any defects are discovered Answer: B Explanation: RTY = product of yields of each process step, reflecting the probability of a unit passing all steps without rework; FTY is a single‑step yield. Question 19. The DMAIC roadmap’s “Analyze” phase primarily focuses on:
A) Defining the problem and project scope B) Measuring current process performance C) Identifying root causes of variation D) Implementing control mechanisms Answer: C Explanation: In Analyze, data are examined to pinpoint the fundamental sources of defects or variation. Question 20. Which of the following is NOT a typical element of a Project Charter? A) Problem Statement B) Goal Statement C) Detailed Process Flow Diagram D) Scope Answer: C Explanation: While a high‑level process map may be included, a detailed flow diagram is usually developed later; the charter focuses on problem, goal, scope, team, and timeline. Question 21. In DFSS, the DMADV methodology’s “Verify” phase is intended to: A) Validate that the design meets customer requirements through testing B) Identify the voice of the customer C) Measure the current process capability D) Analyze failure modes Answer: A
Answer: C Explanation: SIPOC provides a high‑level view; detailed process steps are captured in flowcharts, not SIPOC. Question 25. In Value Stream Mapping, the “Current State” map is used to: A) Show the future ideal process after improvements B) Identify the exact sequence of all value‑added steps only C) Visualize existing flow, waste, and lead times to target improvements D) Document employee training requirements Answer: C Explanation: The Current State VSM captures the present process, highlighting waste and bottlenecks. Question 26. Which stage of team development is characterized by resolving conflicts and establishing norms? A) Forming B) Storming C) Norming D) Performing Answer: C Explanation: In the Norming stage, team members settle into cooperative relationships and clarify standards. Question 27. Cost of Poor Quality (COPQ) includes which of the following?
A) Only the cost of external warranty claims B) All costs associated with defects, including rework, scrap, and lost sales C) Only the cost of training employees on quality tools D) Only capital expenditures for new equipment Answer: B Explanation: COPQ encompasses internal and external failure costs, appraisal costs, and the cost of lost opportunities. Question 28. In stakeholder analysis, a “power‑interest grid” helps to: A) Quantify the financial impact of each stakeholder B) Prioritize communication strategies based on stakeholder influence and interest C) Measure the time each stakeholder spends on the project D) Identify the technical expertise of each stakeholder Answer: B Explanation: The power‑interest grid maps stakeholders to determine who needs to be kept satisfied, informed, or consulted. Question 29. Which measurement scale allows for meaningful addition and subtraction of values? A) Nominal B) Ordinal C) Interval D) Ratio
A) All different B) Mean = Median ≠ Mode C) Mean = Mode ≠ Median D) All equal Answer: D Explanation: In a symmetric distribution (e.g., normal), the three measures of central tendency coincide. Question 33. Which of the following best describes a Poisson distribution? A) Probability of a fixed number of successes in a fixed number of trials B) Number of events occurring in a fixed interval of time/space with a known average rate C) Distribution of continuous data that is always symmetric D) Probability of selecting a specific card from a deck Answer: B Explanation: Poisson models count data for rare events occurring independently over a constant interval. Question 34. The Central Limit Theorem (CLT) states that: A) The population distribution must be normal for sample means to be normal B) As sample size increases, the distribution of sample means approaches a normal distribution regardless of the population shape C) Small samples always produce normal distributions D) The variance of a sample equals the population variance
Answer: B Explanation: CLT enables inference using normal approximations even when the underlying data are not normal, provided the sample size is sufficiently large. Question 35. In hypothesis testing, a Type II error occurs when: A) The null hypothesis is true but incorrectly rejected B) The null hypothesis is false but incorrectly not rejected C) The test statistic falls in the rejection region D) The p‑value is less than α Answer: B Explanation: Type II error (β) is failing to detect a real effect; the null hypothesis is false, yet we accept it. Question 36. For a process with a stable mean and standard deviation of 2, a specification limit at +6σ from the mean corresponds to a defect rate of approximately: A) 0.27% B) 0.00135% C) 3.4 DPMO D) 0.00034% Answer: B Explanation: ±6σ in a normal distribution covers 99.99966% of data, leaving 0.00034% defects; half of that (one‑sided) is 0.00017% ≈ 1.7 ppm, close to answer B. Question 37. The process capability index Cpk is calculated as: A) (USL – LSL) ÷ 6σ
Explanation: Pareto charts display categories in descending order of frequency, highlighting the vital few (≈20%) that cause most problems (≈80%). Question 40. In a Fishbone (Ishikawa) diagram, which of the following is NOT a typical major category? A) Man (People) B) Machine (Equipment) C) Method (Process) D) Marketing Strategy Answer: D Explanation: Traditional categories are Man, Machine, Method, Materials, Measurement, and Mother Nature (Environment). Marketing Strategy is not a standard branch. Question 41. The “5 Whys” technique is primarily used to: A) Generate a large number of improvement ideas B) Identify the root cause by repeatedly asking “Why?” C) Prioritize projects based on financial impact D) Design experiments for factor screening Answer: B Explanation: By asking “Why?” up to five times, teams drill down to underlying causes of a problem. Question 42. In an FMEA, the Risk Priority Number (RPN) is calculated as: A) Severity × Occurrence × Detection B) Severity + Occurrence + Detection
C) (Severity × Occurrence) ÷ Detection D) (Severity × Detection) ÷ Occurrence Answer: A Explanation: RPN combines the three factors to prioritize failure modes; higher RPN indicates higher risk. Question 43. Which test would you use to compare the means of three independent groups when the data are normally distributed and variances are equal? A) One‑way ANOVA B) Two‑sample t‑test C) Kruskal‑Wallis test D) Chi‑square test Answer: A Explanation: One‑way ANOVA assesses differences among three or more group means under those assumptions. Question 44. When the assumptions of normality are violated for a two‑sample comparison, which non‑parametric test is appropriate? A) Paired t‑test B) Mann‑Whitney U test C) One‑sample z‑test D) Fisher’s Exact test Answer: B
C) 12
D) 18
Answer: B Explanation: Full factorial runs = levels^factors = 3^2 = 9. Question 48. Which DOE design is most efficient when the number of factors is large and interactions are assumed to be negligible? A) Full factorial B) Fractional factorial C) Central composite design D) Taguchi L‑9 orthogonal array Answer: B Explanation: Fractional factorial reduces the number of runs while still estimating main effects, assuming higher‑order interactions are small. Question 49. The purpose of a “Poka‑Yoke” device is to: A) Increase production speed by automating tasks B) Prevent errors or make them immediately evident C) Provide visual management of inventory levels D) Standardize work instructions Answer: B Explanation: Poka‑Yoke (mistake proofing) designs processes so that mistakes cannot occur or are instantly detectable.
Question 50. Single‑Minute Exchange of Die (SMED) primarily targets reduction of: A) Setup time to less than ten minutes B.1) Cycle time within the operation C) Overall equipment effectiveness (OEE) D) Number of defects per million Answer: A Explanation: SMED focuses on streamlining changeovers to enable quick switches, often aiming for sub‑ 10 ‑minute setups. Question 51. In SPC, a Western Electric Rule that signals an out‑of‑control condition is: A) One point beyond 1σ from the center line B) Two out of three consecutive points beyond 2σ on the same side C) Four consecutive points alternating above and below the center line D) Six points in a row all within 1σ Answer: B Explanation: Rule 2 (Western Electric) flags two of three consecutive points outside the 2σ warning limits on the same side. Question 52. A CUSUM chart is advantageous over a traditional Shewhart chart because it: A) Detects large shifts faster B) Detects small, persistent shifts more quickly C) Requires fewer data points to compute control limits
