Six Sigma Black Belt
TestPrep Academy
Exam: SSBB
Question: 1 / 55
90:00
You are working with a Six Sigma team for a call center that wants to estimate, with 90% confidence, the range for the average caller wait time during the peak hours of 4:00 p.m. to 8:00 p.m. You select 50 calls randomly and the wait time is recorded. The sample mean is 3.55 minutes and the standard deviation is 1.22 minutes.
What is the confidence interval for this test for means, and how should it be interpreted?
A. Confidence interval is 3.27 - 3.83; the sample mean falls within the confidence interval, so the mean percentage of caller wait time is the same as the sample mean
B. Confidence interval is 3.62 - 3.88; the sample mean falls outside the confidence interval, so the mean percentage of caller wait time is different from the sample mean
C. Confidence interval is 3.27 - 3.83; the sample mean falls outside the confidence interval, so the mean percentage of caller wait time differs from the sample mean
D. Confidence interval is 3.62 - 3.88; the sample mean falls within the confidence interval, so the mean percentage of caller wait time is the same as the sample mean
Hoshin Kanri is a powerful business strategy approach. Which statements best describe how Hoshin Kanri is applied in Six Sigma strategic planning?
A. Six Sigma and Hoshin Kanri focus on continuous improvement
B. Six Sigma creates readiness for Hoshin Kanri planning
C. Hoshin Kanri and Six Sigma are both measurement-driven
D. Hoshin Kanri informs a Six Sigma X-Matrix
The general goal of Lean Six Sigma training is to align team members' knowledge, skills, and abilities, KSAs, with Lean Six Sigma deployment goals of the organization.
Identify the Lean Six Sigma Black Belt's training responsibilities.
A. Create an internal social/learning network to foster knowledge-sharing
B. Create a private network that encourages members to share knowledge amongst Black Belts
C. Develop programs to promote internal business process knowledge transfer between experienced members of various organizations
D. Help identify critical competencies and efforts to fill gaps
E. Ensure team has resources and processes to facilitate experiential learning
F. Help develop team's capabilities using learning and development strategies
Which statements accurately describe the characteristics of Latin square designs?
A. The design requires a relatively small number of runs, making it more efficient than other designs
B. The design provides many degrees of freedom for error in small squares
C. The design offers a way to control variation from two or more noise factors without combining their effects
D. The design can provide valuable information about the interactions between factors
E. The design stipulates that the number of rows, columns, and treatments must be the same
F. The design provides a better estimate of experimental error as square size decreases
Identify five examples of theory-based motivational techniques applied in organizations.
A. Opportunity to do a complete job, rather than piecework
B. Understanding how the work relates to the company's bottom line
C. Opportunity to develop a variety of new skills
D. Ability to earn a performance bonus
E. Opportunity for a promotion
F. Providing complete information about the job
G. Regular feedback from the project manager
What is the ROI percentage for the year, expressed as a percentage, for this particular project? Round your answer to one decimal place.
A. 204.3%
B. 242.4%
C. 232.4%
D. 42.4%
What are the objectives of statistical process control, or SPC?
A. To determine only those variation signs that fall outside the control limits
B. To reduce variation in a process by controlling and improving process performance
C. To use statistical analysis to help identify sources of variation
D. To monitor performance to assess how a process compares to its control limits
E. To identify and improve causes that are inherent to the process and not controllable by process operators
Of 16 new apartment buildings built, 4 are powered at least in part with solar panels. If you were to randomly select 2 buildings one after another, what distribution should be used to find the probability that both of them would have solar panels?
A. Binomial
B. Hypergeometric
C. Poisson
Which objectives can be accomplished though using strategic planning in Lean Six Sigma?
A. Obtaining a "big picture" perspective of the organization
B. Accomplishing Lean Six Sigma goals in order to support the organization's strategic goals
C. Reducing the overall amount of time spent on an initiative or project
D. Gaining a narrow focus on your organization's sub-systems
You're working with a laptop producer to decrease the amount of defects on the manufacturing line.
Which statements correctly interpret the elements of the laptop manufacturing process study?
A. This is a one-tailed test to the left with a strong power of 0.9 and a 95% confidence interval
B. The chance of rejecting the null hypothesis when it's true is 5% and failing to reject the null hypothesis when it's false is 10%
C. This is a one-tailed test to the right with a weak power of 0.90 and a 90% confidence interval
D. The chance of rejecting the null hypothesis when it's true is 10% and failing to reject the null hypothesis when it's false is 5%
Like all designs, the Latin square design has specific characteristics. What are they?
A. The design is less efficient relative to other designs
B. The design requires that the number of rows, columns, and treatments be the same
C. The design tends to return larger experimental error as the size of the square increases
D. The design lacks a way to control the variation of two noise factors
E. The design provides few degrees of freedom for error in small squares
F. The design can't measure interaction effects
A Six Sigma team at an Internet radio company is working to identify future opportunities for improvement and has decided to perform a scenario planning activity to identify possible futures. The team working on the scenario planning activity has established and agreed on the present environment the company faces.
Traditional forecasting indicates that Internet radio usage will continue to grow. Using a PEST analysis, the team explored uncertain variables and, among other variables, found that looming regulation may jeopardize its very existence. Using this analysis, the team groups similar factors.
Based on best practice, what other activities should the team do to complete its scenario planning?
A. Develop detailed scenarios of what could happen if usage does grow and regulation limits operations, and prepare to face the future by creating strategies to deal with each scenario
B. Establish early warning signs to monitor for indicators that usage is increasing
C. Create scenarios to improve organizational weaknesses to better manage risk
D. Develop scenarios to explore the future, based on the information obtained from forecasting activities
E. Using a matrix, explore how regulation and growth in usage will impact the company
F. Group growth in usage and regulation as the most crucial variables
Which four employee motivators examples are examples of theory-based techniques?
A. Having an opportunity to increase one's skill set
B. Receiving a performance bonus
C. Receiving good feedback on a regular basis
D. Ability to increase one's social network
E. Knowing how the work relates to the company's vision and mission
F. Earning an appropriate level of autonomy
An important meeting is underway, and participants are discussing new product ideas. Before the meeting begins, the team waits for Adrienne to arrive. After five minutes, Hugh remembers that Adrienne told him she would be away from the office meeting with clients.
Then, the team leader, Jonathon, calls the meeting to order. He begins by listing the main discussion items on a flip chart. No one has seen the items prior to the meeting, and it takes some time for the team to assimilate the information on the list.
Eventually, they get started. A further delay occurs as Jonathon tries to get the laptop's projector working. Jonathan scheduled 10 minutes for each of the five discussion points on the list, 5 minutes for final voting, and 5 minutes to review action items. Team members stick closely to this timeline, recording decisions and action items as they go, and averaging 10 minutes per item. At one point, the discussion gets heated as an idea from Annette becomes an unexpected focus of debate. Her idea is a departure from the subject that the team had been discussing, and it steers the team away on a tangent that eats into the allocated meeting time.
Jonathon uses the agenda as a way of getting the discussion back on track. He asks the team how the heated discussion relates to the current agenda item and points out that the meeting is nearing the end and they still need to discuss other points.
Team members agree to park the issue until a later date, but because of the initial delays, they arrive at the end of the scheduled hour and still need to make decisions. Jonathon decides to press on and finish the agenda items, to avoid carrying them over to next week's meeting. He quickly summarizes the key decisions and has team members restate their respective action items. The meeting adjourns 15 minutes later than planned.
What should Jonathon have done differently to make his meeting more effective? Identify the strategies that he did
not
apply.
A. Used the agenda to keep the discussion on track
B. Been prepared
C. Reviewed the key points of the meeting
D. Allowed sufficient time for discussion items
E. Observed the start time and end time of meetings
F. Involved the team in developing the agenda
The Six Sigma Black Belt at a major airline is analyzing the passenger processing time at seven of the airline's economy class counters at an airport. She wants to know if the processing time is within control at all times on a given day. The staff at these counters have a similar level of expertise, use the same infrastructure and software, and handle passengers for the same flight at a time.
Which option describes the best choice for a rational subgroup?
A. Select 2 samples from each counter at the beginning of every second hour and chart them as 12 subgroups of 14 samples each
B. Select 10 samples randomly through the entire day from each counter and chart them as 7 subgroups of 10 samples each
C. Select 10 samples randomly from a pool of all customers serviced at the counters on a given day for 7 days, and chart them as 7 subgroups of 10 samples each
What are the main goals of strategic planning in Lean Six Sigma?
A. To use SWOT and PEST analyses to understand where the organization is and how that affects Lean Six Sigma goals
B. To identify and decide what the organization wants to achieve from the Lean Six Sigma deployment
C. To encourage equal focus on all projects and initiatives
D. To ensure senior staff are exclusively involved in setting organizational goals
A Six Sigma Black Belt works for a university. Her current project involves improving services for students who need to learn English as a second language. What are good recommendations for this team's selection?
A. The team should include some faculty members
B. All department heads and their support staff should be part of the team
C. The team can use a personality inventory tool to facilitate teamwork by learning about potential members' aptitudes and decision-making styles
D. The team should have a range of personality types and skills
E. The team should have a total of no more than 20 members
F. When adding a new team member, the team should be involved in the selection process
Identify the implications of the central limit theorem for inferential statistics.
A. The data calculated from samples can be used in control charts, which assume normality
B. A sample size of two will provide a near normal sampling distribution for most population distributions
C. Sample sizes of five are usually sufficient to make x bar approximately normal no matter how far the population is from being normal
D. Confidence intervals can provide probabilistic ranges of values for true population characteristics
E. The standard deviation of the population can be derived from the standard deviation of the x bar distribution
Which four statements describe how leading and lagging indicators are connected to organizational goals and strategies?
A. A cause and effect chain exists between leading and lagging indicators in tracking business goals
B. Lagging indicators with leading indicators don't indicate how outcomes are achieved
C. Leading indicators with lagging Indicators do not result in a measurable performance
D. Lagging indicators can be used to measure performance outcomes based on data collected over a specified period
E. A balanced combination of leading and lagging indicators should be used for enhanced business performance overall
F. Leading indicators are predictive in nature and forecast possible market trends
When determining the scope of a project, which four best practices should you follow?
A. Leave project expectations vague until the scoping is complete
B. Cross boundaries with other projects
C. Focus on the financial aspects of the project
D. Be time conscious
E. Find out what other projects impact your project
F. Aim to write a precise, concise scope statement
You are carrying out a study on local residents to find out how well the neighborhood mall is serving their needs. You take a sample of 500 people and find a p-value of 0.05.
What does this test result imply about statistical and practical significance?
A. An α value of 0.09 implies that the results are practically significant and you fail to reject the null hypothesis
B. A small sample size of 500 implies that there's a good chance of finding a small difference and deeming it practically significant
C. A large sample size of 500 implies that small differences may be detected as statistically significant, even if not practically significant
D. An α value of 0.09 implies that the results would be considered statistically significant and you would reject the null hypothesis
E. All results must be considered for practical significance before instituting any changes
A large hotel chain is kicking off a continuous process initiative that has two objectives: eliminate waste and increase speed in the guest services division, and eliminate variation in the IT division. The executive board is aiming at world-class hotel status and is prepared to make an extensive time and financial commitment to the initiative.
Which statement proposes the best approach for this organization?
A. Implement Six Sigma to begin long-term improvements; when the first projects near completion, implement Lean to harvest low-hanging fruit
B. Implement Six Sigma to make long-term, lasting process improvements
C. Implement Lean to reduce variation; then implement Six Sigma and run kaizen events to harvest low-hanging fruit
D. Implement Lean to eliminate waste and increase speed; then implement Six Sigma to work on eliminating variation
Monty works for a large software publishing company on the East Coast. Recently, the company merged with a small reference book company in California, whose employees will work on converting the books to a compatible electronic format and then will continue to do what they do so well, which is to acquire and publish new reference books. Monty is in charge of integrating the new company and its products into the existing library, which will take input from Programming, Research and Development, Quality Assurance, and HR.
What is the best team model for Monty's situation?
A. A virtual cross-functional team
B. A self-directed Six Sigma team
C. A self-directed project team
Last month, a candy manufacturer introduced four different new chocolate bars – the sales distributions of which were recorded. A team has tracked sales so far this month, and conducted a goodness-of-fit test to find out if the distribution has changed since last month. Review the details in the picture.
Was the test calculated and interpreted correctly?
A. The calculation was performed correctly but the results were interpreted incorrectly
B. The test was interpreted correctly, but the interpretation was based on an incorrect calculation
C. Yes, the test was calculated and interpreted correctly
Identify the considerations that relate to measurement in a service process.
A. Investigating signals that indicate unusual variation in the process behavior
B. Eliminating all variations if detected
C. Developing clear operational definitions
D. Considering all related inputs and outputs
E. Giving equal weight to all types of variation
The Quality Assurance Department at a toy manufacturer wants to know if production variation exists in toy bases made using a plastic molding process. There are five units that produce the toys. Based on historical evidence, it's believed that all bases produced on a given day are very similar and the production conditions don't change on a given day.
Which option describes the best choice for a rational subgroup to assess if the plastic molding process at various units is under control?
A. Select 6 samples randomly on a specific day at each of the 5 units, and chart them as 5 subgroups of 6 samples each
B. Select 2 samples randomly on each of the days in a week at all 5 units, and chart them as 5 subgroups of 14 samples each
C. Select 10 samples randomly over a period of many days at each of the 5 units, and chart them as 5 subgroups of 10 samples each
A team in a customer support center is comparing the performance of three different operators, and has conducted a goodness-of-fit test to determine whether the distribution of dropped calls among the operators is consistent with last year's pattern. Review the details in the picture.
Was the test calculated and interpreted correctly?
A. Yes, the test was calculated and interpreted correctly
B. The test was interpreted correctly, but the interpretation was based on an incorrect calculation
C. The calculation was performed correctly but the results were interpreted incorrectly
You're conducting a study on a new dairy cow diet to increase milk production.
Identify the statements that correctly interpret the elements of the dairy study.
A. This is a two-tailed test with a 95% chance that the population mean will fall within the confidence interval and a strong power of 0.99
B. There's a 5% risk of rejecting the null hypothesis when it's true and a 1% risk of failing to reject the null hypothesis when it's false
C. This is a one-tailed test to the right with a 90% chance that the population mean will fall within the confidence interval and a weak power of 0.9
D. There's a 5% risk of rejecting the null hypothesis when it's true and a 10% risk of rejecting the null hypothesis when it's false
Which represent the three primary goals of robust design?
A. To use DOE to monitor and control performance after launch
B. To determine ideal parameters for manufacturing the product without regard to cost
C. To use the analysis of factors to determine how to manufacture the optimal product at the lowest cost
D. To determine the optimum combination of factors, parameter levels, and tolerances for a design, using analytical tools to make the design resistant to noise
E. To identify and assess the impact of control factors that can be controlled, and noise factors that cannot be controlled
Group challenges and interpersonal difficulties interrupt the positive flow of a meeting.
How should a team leader deal with groupthink or risky-shift forms of maladaptive behavior?
A. Introduce alternative methods of decision making and stimulate team members by encouraging free discussion about alternatives
B. Ask team members to consider if they'd make the same decision if their own money was involved
C. Encourage vocal members to expand fully on their ideas and proposals
D. Challenge the team to come up with alternative approaches and solutions
E. Allow a team's desire for results to drive them, focusing on developing one idea
A metal working manufacturer has been awarded a contract to provide the military with a specialized helicopter part. The company has a master part to use as the standard. The inside circumference of the master part is 103.500 cm. During a bias study, the part is measured using a device with a resolution of 0.025 cm. And the tolerance set for the process is +/- 0.25 cm, giving a tolerance range of 0.5 cm.
Calculate both bias and bias reported as a percent of tolerance. Which statement correctly reports and interprets the bias of this measurement system?
A. A positive bias of 0.005 cm indicates that the device is underestimating the true value of the part, and this bias expressed as a percentage of tolerance is 1%
B. A positive bias of 0.005 cm indicates that the device used to measure the part is overestimating measurements, and this bias is 1% of the tolerance
C. A positive bias of 0.05 cm indicates that the device is overestimating the true value of the part and bias expressed as a percentage of tolerance is 10%
D. A negative bias of 0.05 cm indicates that the device is underestimating the true value of the part and this bias is 10% of the tolerance
What is this project's ROI for the year, expressed as a percentage? Round your answer to one decimal place.
A. 6.2%
B. 7.1%
C. 7.4%
D. 5.1%
E. 8.3%
A roofing company has to build trusses with a 33.00 degree angle at the peak. An angle with a known accuracy of 33.000 degrees has been created as the standard. To test the accuracy of the measuring device, the standard angle is measured 12 times. The resolution of the device is 0.075 degrees. And the tolerance set for the process is +/- 0.010, giving a tolerance range of 0.02.
Which statement offers the correct values and interpretation of bias in this scenario? Round the value of bias to three decimal places.
A. The bias value of 0.019 indicates that the device is overestimating the true value and bias expressed as a percentage of tolerance is 95%
B. The bias value of -0.019 indicates that the device is underestimating the true value and bias expressed as a percentage of tolerance is 95%
C. The bias value of 6.57 indicates that the device is overestimating measurements, and this bias greatly exceeds the tolerance
D. The bias value of -0.019 indicates that the device, on average, is returning measurements that are larger than the reference value and bias expressed as a percentage of tolerance is 95%
The enterprise leadership team at a national hotel chain is assessing potential roadblocks to Six Sigma deployment in the company by performing a roadblock analysis.
Access the Hotel Chain Roadblock Analysis for the results of the analysis, then identify statements that accurately categorize the potential roadblocks identified.
A. The standard procedure requiring top management consensus for team assignments reflects an inefficient organizational structure roadblock
B. One inappropriate culture roadblock is that bonuses are assigned to individuals rather than teams
C. The fact that employees don't like working in teams is an inappropriate organizational culture roadblock
D. The fact that the CEO will only be present at the kick-off reflects inadequate commitment of resources
E. Instructing the project champion to skip the less important steps to meet deadlines is an inappropriate organizational culture roadblock
How is gap analysis used in Six Sigma?
A. Six Sigma teams use gap analysis to measure the results of process improvements to verify whether or not process improvements were gained.
B. Six Sigma teams use gap analysis to identify customer requirements for the products or services being improved.
C. Six Sigma teams use gap analysis to identify gaps between existing performance and desired performance. This information is then used to guide the development of strategies to close those gaps.
Which statement best summarizes the benefit of a postmortem in a Six Sigma project?
A. To assist an organization with continuous improvement by serving as a guide for future Black Belts
B. As part of a Black Belt's toolkit, to assist in performing thorough risk analysis to avoid making mistakes
C. To enable organizations to improve by building on – rather than relearning – lessons from completed projects
D. To ensure that Black Belts have an opportunity to relearn important lessons on every new project
A Six Sigma team at a major educational institute is performing a two-way ANOVA to compare variation in exam results for ten students who have been taught three different lessons by two different instructors.
Assuming an alpha risk value of 0.05, select the statement that accurately interprets the test results.
A. The lesson factor is not statistically significant
B. There is no significant interaction between lesson taught and instructor
C. There is a significant interaction effect between lesson taught and instructor
Which statements best describe how benchmarking can enhance a Six Sigma project?
A. Benchmarking can illustrate that improvements are possible, and gain buy-in for Six Sigma implementation
B. Benchmarking can show where an organization is lagging
C. Benchmarking can focus efforts on the collection of important numbers data
D. Benchmarking can encourage standardization
E. Benchmarking can help find successful improvement ideas from world class practices
In what ways can the balanced scorecard approach be used to help align projects with organizational goals?
A. By eliminating the need for reporting on a project
B. By measuring current performance and comparing it with desired performance
C. By determining how different activities impact each other
D. By enabling you to change organizational goals
E. By offering solutions to close any gaps in a project
Identify statements that define nonparametric tests.
A. They make no assumptions about the data
B. They don't make assumptions about the normality of a population
C. They can be used as alternatives to parametric tests when the population violates the normality assumption
D. Specific nonparametric tests can be used to test specific population characteristics
E. They're used in conjunction with parametric tests when the population violates the normality assumption
A grocery store is interested in determining measurement correlation among the scales at each of its check-out counters in one store. It's imperative that the price charged for weighed items is the same. An employee weighs a variety of objects on each scale and compares measurements. Data generated from each scale is used to calculate a percent agreement value of 30%.
What does this percent agreement value tell the chain about measurement correlation and the measurements derived from the scales?
A. The percent agreement value of 30% is high, telling the grocery chain that there is a lot of variation in the price being charged for weighed grocery items
B. The percent agreement value of 30% indicates a low correlation with the reference standard weights for items
C. The percent agreement value of 30% is low, telling the grocery chain that there is a lot of variation in the price being charged for weighed grocery items
D. The percent agreement value of 30% indicates a low correlation exists among the scales, and the measurement system is doing a good job of charging the same price for weighed items
You're examining the PCE of the manufacturing process for an electronics firm. The sum of work that a customer would recognize as necessary to create the top-of-the-line model DVD player is 6 minutes and the process takes a total of 18 minutes on average. In this case, what is the PCE?
Express your answer as a percentage, rounded to the nearest whole number.
A. 33%
B. 33
C. 33 percent
A retail bank wants to determine the joint probability for two key continuous process variables in auto loan application processing – the experience of the processing agent, and the loan amount. Both variables are continuous, and a correlation study reveals that they are poorly correlated. Which distribution is the best for this data?
A. Bivariate normal
B. Lognormal
C. Exponential
D. Weibull
Occasionally, you may need to deal with interpersonal difficulties and group challenges that interrupt the positive flow of a meeting.
How can a team leader deal with the maladaptive behaviors of groupthink and risky-shift?
A. Encourage critical thinking and free discussion of alternatives
B. Reward individuality of thinking and of action
C. Ask how members would proceed if they had to use their own money
D. Break the team up and incorporate new team members
E. Challenge the team to devise alternative solutions
F. Give every team member a role or a rank
Improving robustness and optimizing results are two purposes of the design of experiments, or DOE, approach.
Identify some of the other purposes of DOE.
A. Increasing variability
B. Conducting numerous runs
C. Achieving a target
D. Choosing between alternatives
E. Identifying key factors affecting an output
Three employees of an organization are stakeholders in a Six Sigma project. Ursula is a senior manager who selected the project and is responsible for supervising Andy. Andy provides coaching and support to Tim. Tim is involved with data collection on the project, and works on several other improvement projects.
Which statement most accurately describes each member's Six Sigma role?
A. Andy is a Master Black Belt, Ursula is a process owner, and Tim is a Black Belt
B. Ursula is a project champion, Andy is a Black Belt, and Tim is a Green Belt
C. Tim is a Green Belt, Ursula is a Master Black Belt, and Andy is a project champion
Which four statements describe how leading and lagging indicators are connected to organizational goals and strategies?
A. Lagging indicators without leading indicators don't indicate how outcomes are achieved
B. A mix of leading and lagging indicators should be used for enhanced business performance overall
C. Lagging indicators are predictive in nature and difficult to quantify
D. A cause and effect chain exists between lead and lag indicators in tracking business goals
E. Leading indicators without lagging Indicators do not result in a measurable performance
F. Leading indicators can be used to show trends based on data collected over a specified period
Which of these are considerations related to measurement in a service context?
A. Assessing signals for potential performance impacts
B. Treating special cause variation as a desirable indicator
C. Establishing unambiguous definitions of service related terms
D. Measuring processes holistically
E. Measuring more objectively
What is the purpose of gap analysis in Six Sigma?
A. Gap analysis is used to measure key performance metrics, thereby helping to understand how a current process must be changed in order to achieve improvement
B. Gap analysis is used to identify the difference between an organization's current performance and the potential performance in order to develop strategies to bring actual performance in line with desired performance
C. Gap analysis is used to define opportunities for improvement by showing how current processes are falling short of customer requirements
Which examples demonstrate how hidden factories negatively impact organizational processes?
A. Scrap parts from a process are discarded without checking whether any are reusable
B. A missing screw on a computer chassis goes undetected until the computer is fully assembled
C. A product's delivery was delayed by one hour because the customer's payment wasn't cleared by the bank
D. Money is spent on repairs for specialized equipment as part of regular maintenance
Which of these options are considerations associated with collecting customer data?
A. Primary data sources are also known as indirect sources
B. Primary and secondary data sources are the two main sources for gathering information
C. Data can be obtained from different levels within an organization
D. Business level customers include those who purchase a product or service
E. Valuable data can be gathered from both external customers and internal customers
What are the characteristics of CTx requirements?
A. CTx requirements are measurable
B. CTx requirements are derived directly from the voice of business
C. CTx requirements do not change during project implementation
D. CTx requirements are identifiable at different levels of operation
E. A change in CTx requirements can impact the system
F. CTx requirements relate to business or customer requirements
An electronics manufacturer produces several electronic components that are all quite similar but are produced on different production lines. Each production line has an assigned operator. These operators take measurements, using a common device, each morning as they start their shift and each afternoon as their shifts are ending. Typically, this data is used to identify process variation. But the company also uses it to check measurement correlation. Last month's data indicates a percent agreement of 88% for measurements taken in the morning shift.
What does this data say about correlation in the measurement system?
A. A percent agreement value of 88% indicates a high correlation, meaning that operators are using consistent measurement methods at the beginning and end of all shifts
B. A percent agreement value of 88% indicates that the measurement correlation is high, and components are consistently the correct size
C. A percent agreement value of 88% indicates that the measurement of all the data gatherers are highly correlated, when measuring similar artifacts using the same devices
D. A percent agreement value of 88% indicates a moderate correlation between the measurements of all operators, when measuring similar artifacts using the same device
Which statement reflects the best strategy for ongoing evaluation?
A. Use a failure mode and effects analysis (FMEA) to identify what could go wrong with the process
B. Balance your measurements with interviews of salespeople to learn their perspectives on evolving customer and market needs
C. Use a combination of audit results and results of SWOT analyses to explore process problems
D. Use a balance of measurements – performance measures and opportunities analysis – to obtain a broad perspective on the performance of the improved processes
A Six Sigma team wants to improve the durability of lenses for a manufacturer of sunglasses. Investigation has indicated that two factors – the thickness of scratch-resistant coating and the type of lens – have the greatest impact on lens durability. The team decides to test each factor at two levels. A randomized experiment with four runs involving all possible combinations of factors and levels has been planned.
Will this meet the team's resolution needs, and why or why not?
A. Yes, the team has planned a fractional factorial experiment, which meets its resolution needs
B. Yes, the team has planned a full factorial experiment, which meets its resolution needs
C. No, the team has not included enough runs for a full factorial experiment
D. No, the team has planned a fractional factorial experiment and it won't meet resolution needs
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