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CSSGB practice questions

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Question 1Overview: Six Sigma and the Organization

As a statistical metric, a process operating at a Six Sigma level produces approximately how many defects per million opportunities?

  1. 233
  2. 6,210
  3. 3.4 Correct answer.
  4. 66,807

Explanation

Six Sigma corresponds to roughly 3.4 defects per million opportunities, about 99.99966 percent conforming. Each of the other values corresponds to a lower sigma level on the standard conversion table.

Question 2Overview: Six Sigma and the Organization

Six Sigma was originally developed in the mid-1980s at which company?

  1. Motorola Correct answer.
  2. IBM
  3. General Electric
  4. Toyota

Explanation

Six Sigma originated at Motorola as a response to quality problems in its products and was later widely publicized when adopted at General Electric. Toyota is associated with the Toyota Production System and lean thinking rather than with Six Sigma.

Question 3Overview: Six Sigma and the Organization

Which sequence correctly orders the phases of the DMAIC methodology?

  1. Define, Measure, Analyze, Improve, Control Correct answer.
  2. Define, Analyze, Measure, Improve, Control
  3. Measure, Define, Analyze, Improve, Control
  4. Define, Measure, Improve, Analyze, Control

Explanation

DMAIC stands for Define, Measure, Analyze, Improve and Control. The order is fixed because valid measurement must precede analysis, and analysis must precede improvement.

Question 4Overview: Six Sigma and the Organization

A product is scrapped during production because it fails an in-process inspection. This cost is best classified as:

  1. an external failure cost
  2. a prevention cost
  3. an internal failure cost Correct answer.
  4. an appraisal cost

Explanation

Costs of poor quality fall into prevention, appraisal, internal failure and external failure categories. Defects found before the product reaches the customer are internal failure costs.

Question 5Overview: Six Sigma and the Organization

A Green Belt typically differs from a Black Belt in that a Green Belt:

  1. leads projects part-time while keeping other duties Correct answer.
  2. serves as the senior executive sponsor of the deployment
  3. certifies and mentors Black Belts across the enterprise
  4. works only on design for Six Sigma projects

Explanation

Green Belts lead improvement projects within their own work area while continuing their regular job, whereas Black Belts generally dedicate full time to projects. Certification and mentoring of belts is a Master Black Belt responsibility.

Question 6Overview: Six Sigma and the Organization

Lean thinking is primarily directed at:

  1. designing experiments to optimize factors
  2. identifying the voice of the customer
  3. reducing variation in process outputs
  4. eliminating waste and improving flow Correct answer.

Explanation

Lean concentrates on removing non-value-adding waste and improving flow and cycle time, while Six Sigma concentrates on reducing variation and defects. The two approaches are complementary rather than competing.

Question 7Overview: Six Sigma and the Organization

A step in a process is considered value-added when it:

  1. is inspected by a quality technician
  2. moves material between the work centers
  3. changes the product as the customer requires Correct answer.
  4. is required by the company's documented accounting policy

Explanation

Work is value-added only if it transforms the product or information, is done correctly the first time, and is something the customer would be willing to pay for. Inspection and material movement are classic non-value-adding activities.

Question 8Overview: Six Sigma and the Organization

A critical-to-quality (CTQ) characteristic is best described as:

  1. any process input the team is able to measure
  2. the specification limit chosen by the engineering group
  3. a defect category recorded on a check sheet
  4. a measurable feature the customer considers essential Correct answer.

Explanation

A CTQ translates a customer need into a measurable product or service characteristic with a target and specification limits. It originates from the voice of the customer rather than from internal convenience.

Question 9Overview: Six Sigma and the Organization

A Black Belt project is stalled because two department managers will not release staff for data collection. Which role is responsible for removing this barrier?

  1. the project Champion Correct answer.
  2. the Master Black Belt
  3. the process owner
  4. the Green Belt on the team

Explanation

The Champion is the senior sponsor who secures resources, resolves cross-functional conflicts and removes organizational barriers for the project. Process owners sustain results after completion, and Master Black Belts provide technical guidance.

Question 10Overview: Six Sigma and the Organization

The primary contribution of a Master Black Belt to a Six Sigma deployment is to:

  1. train and mentor Black Belts across the business Correct answer.
  2. serve as the executive sponsor for a single project
  3. collect the measurement data for the team
  4. take ownership of the process after the project closes

Explanation

Master Black Belts are the technical experts who train and coach belts, review project methods and help deploy the methodology across the organization. They work at the program level rather than on one project's data.

Question 11Overview: Six Sigma and the Organization

After a Six Sigma project is closed, ongoing accountability for the performance of the improved process rests with the:

  1. process owner Correct answer.
  2. Champion
  3. Black Belt
  4. Master Black Belt

Explanation

The process owner accepts the improved process at handoff and sustains the gains by following the control plan and monitoring metrics. The Black Belt moves on to the next project once control is established.

Question 12Overview: Six Sigma and the Organization

A company is developing a brand-new service offering that has no existing process or baseline data. Which approach is most appropriate?

  1. statistical process control, because the process must be stabilized
  2. DFSS, since the design must meet customer needs from the start Correct answer.
  3. DMAIC, because it always begins with measuring a baseline
  4. a kaizen event, because rapid change is required

Explanation

Design for Six Sigma is used when a product or process does not yet exist and capability must be designed in rather than corrected afterward. DMAIC assumes an existing process with data to measure.

Question 13Overview: Six Sigma and the Organization

Which of the following is an appraisal cost?

  1. training operators in defect prevention
  2. warranty repairs performed after the sale
  3. incoming inspection of purchased material Correct answer.
  4. rework of defective units before shipment

Explanation

Appraisal costs are incurred to evaluate conformance to requirements, such as inspection, testing and audits. Rework and warranty costs are failure costs, and prevention training is a prevention cost.

Question 14Overview: Six Sigma and the Organization

Rolled throughput yield (RTY) for a multi-step process is calculated as:

  1. the product of the yields of all the steps Correct answer.
  2. the yield of the final step only
  3. the yield of the slowest step in the process
  4. the arithmetic average of the yields of each step

Explanation

RTY multiplies the first-pass yields of every step, giving the probability that a unit passes through the entire process without rework or scrap. Averaging or using a single step masks the cumulative effect of multiple process steps.

Question 15Overview: Six Sigma and the Organization

The 'hidden factory' in a process refers to:

  1. overtime required to meet seasonal demand
  2. the portion of a plant that is not scheduled for production
  3. unrecorded inventory held between the process steps
  4. capacity consumed by rework and correction work Correct answer.

Explanation

The hidden factory is the extra labor, time and capacity consumed by rework, sorting, expediting and scrap. This work rarely appears as a separate line in standard cost reports, so the true cost of poor quality stays hidden.

Question 16Overview: Six Sigma and the Organization

The balanced scorecard measures organizational performance across four perspectives: financial, customer, internal process, and:

  1. learning and growth Correct answer.
  2. supplier
  3. regulatory
  4. technology

Explanation

The four balanced scorecard perspectives are financial, customer, internal business process, and learning and growth. The learning and growth perspective covers employee capability, culture and information systems.

Question 17Overview: Six Sigma and the Organization

Benchmarking is best described as:

  1. auditing a process against its own documented procedure
  2. setting internal targets from last year's results
  3. comparing performance with best-in-class organizations Correct answer.
  4. measuring customer satisfaction by survey

Explanation

Benchmarking compares a process and its performance metrics against recognized best-in-class organizations or practices, often outside the company's own industry. It exposes performance gaps that internal comparisons cannot reveal.

Question 18Overview: Six Sigma and the Organization

When screening candidate Six Sigma projects, the most important criterion is whether the project:

  1. can be completed within a single month
  2. links to a strategic objective with measurable gain Correct answer.
  3. was originally suggested by the quality department
  4. uses advanced statistical tools and software

Explanation

Project selection should be driven by the business strategy: the project must address a significant gap and deliver a measurable financial or customer benefit. Tool sophistication, origin of the idea and short duration are secondary considerations.

Question 19Overview: Six Sigma and the Organization

A project's financial benefit comes from avoided future hires that the budget never included. This benefit is best described as:

  1. a capital cost avoidance
  2. a prevention cost
  3. soft savings Correct answer.
  4. hard savings

Explanation

Soft savings are benefits that do not appear as a direct reduction in an approved budget, such as cost avoidance or freed capacity. Hard savings reduce actual spending and can be traced to the financial statements.

Question 20Overview: Six Sigma and the Organization

A kaizen event is characterized by:

  1. a brief, focused team effort to improve a process Correct answer.
  2. a year-long capability study run by a Black Belt
  3. an external audit of the quality system
  4. a redesign of the product using DFSS

Explanation

A kaizen event is a short, intensive workshop in which a team analyzes and implements improvements to a targeted process within days. It contrasts with longer DMAIC projects that require extended measurement and analysis.

Question 21Overview: Six Sigma and the Organization

A plant sharply cuts prevention spending and then sees external failure costs rise. Which statement best interprets the result?

  1. The plant optimized total quality cost because prevention is discretionary
  2. Total quality cost likely rose, since prevention reduces failure costs Correct answer.
  3. External failure costs are unrelated to prevention activities
  4. Appraisal costs must have fallen at the same rate

Explanation

Prevention and appraisal spending are investments that reduce failure costs, so reducing prevention usually shifts cost into internal and external failures. Total cost of quality is minimized at a balance point, not by eliminating prevention entirely.

Question 22Overview: Six Sigma and the Organization

Which pattern most reliably predicts a Six Sigma deployment that will fail to deliver results?

  1. Champions review project progress each month
  2. Master Black Belts mentor several belts
  3. Belts select projects that match their own interests Correct answer.
  4. Green Belts work part-time in their own areas

Explanation

Deployments fail when the project portfolio reflects belt convenience rather than business priorities, because improvements then do not affect the metrics leadership cares about. Governance should select and review projects against strategic objectives.

Question 23Overview: Six Sigma and the Organization

A process produces 40,000 units, and 1,200 defects are found across 4 defect opportunities per unit. What is the approximate DPMO?

  1. 1,200
  2. 7,500 Correct answer.
  3. 3,000
  4. 30,000

Explanation

DPMO equals defects divided by total opportunities, multiplied by one million: 1,200 divided by (40,000 times 4) times 1,000,000, which equals 7,500. Forgetting to multiply the unit count by the number of opportunities is the most common error.

Question 24Overview: Six Sigma and the Organization

Which statement best explains why Six Sigma is described as a management system rather than only a statistical toolkit?

  1. It relies heavily on control charts to keep processes stable
  2. It depends on leadership governance and resource allocation Correct answer.
  3. It reports results as defects per million opportunities
  4. It follows a defined sequence of five project phases

Explanation

Six Sigma is a management system because it embeds governance, roles, resource allocation and strategy-linked project reviews into how the organization runs. Tools and metrics support that system but do not define it on their own.

Question 25Overview: Six Sigma and the Organization

Near the end of a successful pilot, operators revert to the old method whenever the belt is absent. Which root cause is most consistent with this observation?

  1. The measurement system was shown to be inadequate during the pilot
  2. The sample size used in the pilot was too small
  3. The control plan was never fully documented
  4. Ownership and buy-in were never built with the workforce Correct answer.

Explanation

Reversion to old methods once the change agent leaves is the classic symptom of missing ownership and inadequate change management. Sustained improvement requires the people who do the work to understand, accept and own the new method.

Question 26Overview: Six Sigma and the Organization

Six Sigma originated as a company-wide improvement initiative at which organization?

  1. Ford
  2. General Electric
  3. Toyota
  4. Motorola Correct answer.

Explanation

Six Sigma was created at Motorola in the mid-1980s as a response to chronic defects and warranty costs, and was later popularized and expanded by General Electric. Toyota is associated with the Toyota Production System and lean thinking rather than Six Sigma.

Question 27Overview: Six Sigma and the Organization

In the expression Y = f(x), what does the Y represent?

  1. The output or result the customer experiences Correct answer.
  2. The process inputs that the team can control
  3. The natural variation inherent in the process
  4. The transfer function that links inputs to outputs

Explanation

The model states that results (Y) are a function of process inputs (x). Y is the outcome measure the customer feels, while the x's are the controllable causes the team investigates and adjusts.

Question 28Overview: Six Sigma and the Organization

A process operating at the six sigma level is commonly said to produce approximately how many defects per million opportunities?

  1. 233
  2. 3.4 Correct answer.
  3. 6,210
  4. 66,807

Explanation

The widely used benchmark for six sigma performance is 3.4 defects per million opportunities. The larger figures in the options correspond to lower sigma levels, so they describe less capable processes.

Question 29Overview: Six Sigma and the Organization

A team calculates the cost of material scrapped before shipment and the labor spent reworking units caught at final inspection. In cost-of-quality terms, these costs are classified as:

  1. Prevention costs
  2. Internal failure costs Correct answer.
  3. Appraisal costs
  4. External failure costs

Explanation

Costs of defects detected before the product reaches the customer are internal failure costs, which include scrap and rework found inside the plant. External failure costs apply only after delivery, such as warranty or field returns.

Question 30Overview: Six Sigma and the Organization

Which description best matches the role of a Six Sigma Green Belt?

  1. A full-time improvement leader who mentors Black Belts across the enterprise
  2. A process operator who documents standard work but does not lead projects
  3. An executive who selects projects and allocates deployment resources
  4. A trained practitioner who leads projects part-time alongside regular duties Correct answer.

Explanation

Green Belts are trained in the methodology and lead projects within their own work area while continuing their normal job responsibilities. Full-time, enterprise-wide project leadership and mentoring is the Black Belt and Master Black Belt scope.

Question 31Overview: Six Sigma and the Organization

A company is launching a new offering and needs to convert customer requirements into specific design and process requirements. Which tool is designed for this translation?

  1. Control charting
  2. Quality function deployment Correct answer.
  3. Pareto analysis
  4. Failure mode and effects analysis

Explanation

Quality function deployment uses a structured matrix to link voice-of-the-customer statements to technical design and process requirements. The other tools address risk ranking, process stability monitoring, or prioritization of existing problem data rather than requirement translation.

Question 32Overview: Six Sigma and the Organization

In a mature Six Sigma deployment, which group typically reviews the project portfolio, allocates resources, and removes cross-functional barriers?

  1. The deployment steering committee Correct answer.
  2. External consultants
  3. The Black Belts collectively
  4. The quality assurance department

Explanation

A steering or leadership committee owns the portfolio: it charters projects, authorizes resources, and resolves issues that span functions. Individual belts execute projects but do not control enterprise resource allocation.

Question 33Overview: Six Sigma and the Organization

Why does the widely cited six sigma benchmark of 3.4 defects per million opportunities differ from the near-zero value predicted by the normal distribution alone?

  1. Because inspection removes nearly all defects before they reach the customer
  2. Because the benchmark allows for an assumed 1.5 sigma drift of the process mean over time Correct answer.
  3. Because opportunities are counted per unit rather than per characteristic
  4. Because the benchmark assumes every process is perfectly centered on its target

Explanation

The conventional benchmark builds in an empirical allowance of about 1.5 sigma of mean shift between short-term and long-term performance, which raises the expected defect count to 3.4 per million. Without that allowance, six sigma of short-term capability implies defects far below one per million.

Question 34Overview: Six Sigma and the Organization

A business unit reports that its belt projects have fully met their savings targets, yet customer complaints and the customer perspective of the scorecard have not improved. What is the best interpretation?

  1. The reported savings must be overstated by finance
  2. Projects addressed internal efficiency rather than customer CTQs Correct answer.
  3. Customer complaints always lag project results by a year or more
  4. Scorecards are invalid when they mix internal and external measures

Explanation

Savings can be genuine while customer-perceived performance stays flat if the projects were scoped around internal cost or throughput measures instead of the CTQs customers care about. The remedy is to recheck the linkage between project Y measures and voice-of-the-customer requirements.

Question 35Define

Which document formally authorizes a Six Sigma project and defines its boundaries?

  1. The control plan
  2. The data collection plan
  3. The measurement system analysis
  4. The project charter Correct answer.

Explanation

The project charter is the formal authorization for a Six Sigma project; it names the problem, goal, scope, team, and expected benefit. Later-phase tools such as control plans and data collection plans are created only after the project has been chartered.

Question 36Define

Translating a customer statement such as 'I want my order to arrive quickly' into a measureable requirement produces which of the following?

  1. A control chart
  2. A critical-to-quality characteristic Correct answer.
  3. A process capability index
  4. A sampling plan

Explanation

A critical-to-quality (CTQ) characteristic converts a vague customer need into something measurable, such as order lead time in days. Control charts, capability indices, and sampling plans are statistical tools applied later to data, not the translation of the need itself.

Question 37Define

In a SIPOC diagram, the acronym stands for which sequence?

  1. System, Input, Process, Output, Control
  2. Standard, Input, Procedure, Output, Check
  3. Source, Inspection, Plan, Outcome, Correction
  4. Supplier, Input, Process, Output, Customer Correct answer.

Explanation

SIPOC is Supplier, Input, Process, Output, Customer, a high-level view used in Define to agree on process boundaries and interfaces. The other sequences mix in unrelated quality terms and do not describe the elements of a SIPOC diagram.

Question 38Define

Which role provides resources, removes organizational barriers, and reports project status to senior leadership?

  1. The process operator on the line
  2. The external quality auditor
  3. The green belt's coworkers in the department
  4. The project sponsor (champion) Correct answer.

Explanation

The sponsor, often called the champion, secures resources, clears barriers, and links the project to management. Operators and coworkers execute process work, and an external auditor evaluates compliance rather than sponsoring the project.

Question 39Define

In the Kano model, which category describes features whose absence causes dissatisfaction but whose presence does not raise satisfaction?

  1. Performance (one-dimensional) requirements
  2. Indifferent attributes
  3. Must-be (basic) requirements Correct answer.
  4. Delighter (attractive) requirements

Explanation

Must-be requirements are taken for granted: customers are dissatisfied when they are missing, but their presence yields no extra satisfaction. Delighters create unexpected satisfaction, and performance requirements increase satisfaction proportionally with the level delivered.

Question 40Define

Which phrasing is appropriate for a problem statement in the Define phase?

  1. Written as a preferred solution that the team intends to implement
  2. Focused on which employees are responsible for the defects
  3. Kept general and broad so that scope can expand as needed
  4. Stated in measurable terms with magnitude, time, and location Correct answer.

Explanation

A strong problem statement quantifies the gap, when it occurs, and where in the process it occurs, without presuming a cause or solution. Solution-laden, vague, or blame-oriented statements bias the team and cannot be verified later.

Question 41Define

A well-written goal statement in a Six Sigma charter should include which of the following?

  1. A measurable target and a completion date Correct answer.
  2. A list of every possible root cause of the problem
  3. The statistical test that will be applied
  4. The name of the supplier that will be selected

Explanation

Goal statements are commonly written to be specific, measurable, achievable, relevant, and time-bound, which requires a numeric target and a deadline. Causes, suppliers, and statistical tests are determined later and do not belong in the goal statement.

Question 42Define

Which of the following is an internal failure cost within cost of poor quality?

  1. Scrap generated during production Correct answer.
  2. Warranty claims paid to customers after the sale
  3. Incoming inspection of purchased material
  4. Preventive maintenance on production equipment

Explanation

Internal failure costs are incurred when defects are found before the product reaches the customer, such as scrap, rework, and downtime. Warranty claims are external failure costs, while preventive maintenance and incoming inspection are prevention and appraisal costs respectively.

Question 43Define

The Pareto principle, as applied in Six Sigma projects, states that:

  1. All causes contribute roughly equally to the problem
  2. A small number of causes account for most of the effect Correct answer.
  3. Variation in a process always decreases over time
  4. Defects in a process follow a normal distribution

Explanation

The Pareto principle holds that a few categories typically drive most of the problem, so the vital few should be attacked first. It says nothing about equality of causes, natural reduction of variation, or normality of defect counts.

Question 44Define

What is the main purpose of a stakeholder analysis in the Define phase?

  1. Verify that the measurement system is adequate
  2. Determine the statistical power needed for the hypothesis test
  3. Calculate the cost of poor quality for the current process
  4. Identify parties affected by the project and plan how to engage them Correct answer.

Explanation

Stakeholder analysis identifies who is affected by or can influence the project and clarifies how each party should be engaged, which reduces resistance during implementation. Power analysis, cost of poor quality, and measurement studies serve different purposes.

Question 45Define

What is the primary purpose of Quality Function Deployment and its House of Quality?

  1. Map the sequence of process steps and identify non-value-added activities
  2. Rank defects by their frequency of occurrence so the vital few can be addressed
  3. Determine the sample size required for a process capability study
  4. Translate customer needs into prioritized technical requirements Correct answer.

Explanation

Quality Function Deployment links customer requirements to technical design characteristics and uses relationship scoring to show which characteristics matter most. Defect ranking, sample size determination, and process step mapping are served by other tools.

Question 46Define

In the Tuckman model of team development, in which stage do members test boundaries and compete for roles?

  1. Norming
  2. Performing
  3. Storming Correct answer.
  4. Forming

Explanation

During storming, members surface differences, challenge the leader, and negotiate roles, which can create conflict. Forming is polite orientation, norming is agreement on how to work, and performing is productive execution.

Question 47Define

In a project charter, scope is best described by which of the following?

  1. The software that will be used to analyze the collected data
  2. The process start and stop points and what is excluded Correct answer.
  3. The number of team members available to work on the project
  4. The amount of budget approved by the finance department

Explanation

Scope defines where the process under study begins and ends and explicitly states exclusions, which prevents scope creep. Team size, budget, and software choices are project constraints or resources rather than boundaries of the process being improved.

Question 48Define

Within the Six Sigma infrastructure, what is the primary contribution of a Master Black Belt?

  1. Owns the process and implements the approved solutions
  2. Performs data entry for the project's measurement system
  3. Approves the organization's annual operating budget
  4. Provides technical leadership and coaches several project teams Correct answer.

Explanation

Master Black Belts supply technical expertise and mentor green and black belts across many projects. Process ownership, routine data entry, and enterprise budgeting belong to other roles.

Question 49Define

The business case section of a project charter is intended to answer which question?

  1. Which statistical software package the team will use for analysis
  2. Who will be responsible for collecting the data each week
  3. Why the project is worth doing in financial and strategic terms Correct answer.
  4. How the process will be monitored after the improvement is made

Explanation

The business case justifies the project by linking it to financial return and strategic priorities, which supports resource commitment. Software choice and data ownership are logistics, while post-improvement monitoring is addressed in the Control phase.

Question 50Define

A CTQ tree breaks down which of the following?

  1. A process map into its decision points and rework loops
  2. A cost report into budgeted and actual expense categories
  3. A control chart into its center line upper and lower control limits
  4. A broad customer need into specific measurable requirements Correct answer.

Explanation

A CTQ tree starts with a general customer need and successively decomposes it into narrower, measurable characteristics that the process can deliver. Control chart components, cost categories, and process decision points are structured by other tools.