Lean Six Sigma Green Belt Certification Exam

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Lean Six Sigma Green Belt Certification Exam - Quiz

Welcome to NRCP Lean Six Sigma Green Belt Certification Exam.
You are given 90 minutes to complete the exam. There is a "Save for Later" function that is able to save your progress until you consume your 90 minutes. You will be given three attempts including failed and time-ups.
You have until December 31, 2015 to complete the exam.
Good luck!

Questions and Answers

1.

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2.

A Process is operating at 6 Sigma:
- A.
  
  We can expect 3.2 defects per million opportunities
- B.
  
  It has a yield of 99.997%
- C.
  
  We can expect 3.4 defects per million opportunities
- D.
  
  It has a yield of 99.9967%
Correct Answer
C. We can expect 3.4 defects per million opportunities

Explanation
A process operating at 6 Sigma is considered to be highly efficient and has a very low defect rate. The standard defect rate for a 6 Sigma process is 3.4 defects per million opportunities, which means that out of every million opportunities, only 3.4 defects are expected. Therefore, the given answer of "We can expect 3.4 defects per million opportunities" is correct in relation to a process operating at 6 Sigma.

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3.

A normal Distribution can best be described as:
- A.
  
  Bell-shaped, a variance of 1, the mean/median/mode
- B.
  
  Bell-shaped, symmetrical about the mean, a single mode
- C.
  
  Un-Symmetrical about the mean, a natural tolerance of three standard deviations, unimodal
- D.
  
  Symmetrical about the mean, bell-shaped, discrete data
Correct Answer
B. Bell-shaped, symmetrical about the mean, a single mode

Explanation
A normal distribution is characterized by being bell-shaped, meaning that the majority of the data falls around the mean and tapers off towards the tails. It is also symmetrical about the mean, meaning that the data is equally distributed on both sides of the mean. Additionally, a normal distribution has a single mode, indicating that there is one value that occurs most frequently in the data. Therefore, the given answer accurately describes the characteristics of a normal distribution.

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4.

A process is in-control and stable. Describe the type of variation that exists in the process.
- A.
  
  Special Cause variation
- B.
  
  Natural Variation
- C.
  
  Out-the-ordinary varation
- D.
  
  Non-random variation
Correct Answer
A. Special Cause variation

Explanation
The given correct answer for this question is "Special Cause variation". This type of variation refers to the presence of specific, identifiable factors that cause the process to deviate from its normal behavior. These factors can be attributed to specific events, circumstances, or actions that are outside of the usual operating conditions of the process. Special Cause variation is characterized by sporadic, non-random patterns that can be traced back to a specific cause, and it can be addressed by identifying and eliminating the root cause of the deviation.

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0
3
5.

Indicate which are examples of variable data: 1)Length, 2)Weight, 3)QA Result, 4)Dollars, 5)Days
- A.
  
  1,3,4,5
- B.
  
  1,2,4
- C.
  
  1,2,4,5
- D.
  
  1,4,5
Correct Answer
C. 1,2,4,5

Explanation
Variable data refers to data that can change or vary. In this case, length, weight, dollars, and days are examples of variable data. These values can differ from one situation to another, unlike fixed or constant data. QA result is not considered variable data as it typically represents a fixed outcome or result. Therefore, the examples of variable data in this question are 1, 2, 4, and 5.

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6.

Your control chart shows seven consecutive points on one side of the mean. What does this indicate?
- A.
  
  The process is in-control (within the UCL and LCL)
- B.
  
  The process appears to be too table and should be questioned
- C.
  
  The process needs to be checked for special causes
- D.
  
  The wrong control chart has been selected
Correct Answer
B. The process appears to be too table and should be questioned

Explanation
This answer is incorrect. The correct answer is "The process needs to be checked for special causes." A control chart is used to monitor a process over time and detect any unusual variations or special causes. When seven consecutive points fall on one side of the mean, it suggests that there may be a systematic issue causing the process to deviate from its normal behavior. Therefore, the process should be investigated further to identify and address any special causes that may be present.

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7.

Which Steps should you take when you notice special causes in a control chart?
- A.
  
  Do nothing
- B.
  
  Continue taking data measurements to confirm your belief
- C.
  
  Stop and identify the Special Causes
- D.
  
  Stop, identify the special Causes and eliminate them
Correct Answer
D. Stop, identify the special Causes and eliminate them

Explanation
When special causes are noticed in a control chart, it is important to stop and identify them. This is because special causes indicate that there are factors in the process that are causing variation beyond the normal random variation. By identifying these special causes, it becomes possible to understand and eliminate them, thereby improving the overall process and reducing variation. Simply continuing to take data measurements may confirm the presence of special causes, but it does not address the root cause of the problem. Doing nothing is also not recommended as it allows the special causes to persist and potentially worsen the process performance.

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8.

Select the corect mean, median and mode for the following sample: 4,5,6,1,1,2,5,7,5
- A.
  
  4,4,5
- B.
  
  3,5,4
- C.
  
  4,3,5
- D.
  
  4,5,5
Correct Answer
D. 4,5,5

Explanation
The given sample is 4,5,6,1,1,2,5,7,5. To find the mean, we add up all the numbers in the sample and divide by the total count. (4+5+6+1+1+2+5+7+5)/9 = 36/9 = 4. The median is the middle value in a sorted list. When we arrange the numbers in ascending order, we get 1,1,2,4,5,5,5,6,7. The middle value is 5, so the median is 5. The mode is the number that appears most frequently in the sample. In this case, 5 appears three times, which is more than any other number, so the mode is 5.

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9.

Select the key attributes of successful Six Sigma programs. 1) Senior management commitment 2) High ROI projects 3) Projects with short durations 4) Proper funding 5) Well-trained staff 6) Properly scoped projects
- A.
  
  1,3,5,6
- B.
  
  1,4,5,6
- C.
  
  1,5,6
- D.
  
  1,2,4,5,6
Correct Answer
D. 1,2,4,5,6

Explanation
Successful Six Sigma programs require several key attributes. Firstly, senior management commitment is crucial as it sets the tone and provides the necessary support for the program's success. Secondly, high ROI projects ensure that the efforts and resources invested in the program yield significant returns. Proper funding is also essential to ensure that the program has the necessary resources to operate effectively. Well-trained staff is another important attribute as they possess the skills and knowledge required to implement and sustain the program. Lastly, properly scoped projects ensure that the program focuses on the right areas and achieves its objectives efficiently. Therefore, the correct answer is 1,2,4,5,6.

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10.

An attribute chart can be represented by all of the following EXCEPT...
- A.
  
  P-chart
- B.
  
  R-chart
- C.
  
  Np chart
- D.
  
  C Chart
Correct Answer
B. R-chart

Explanation
An attribute chart is a statistical tool used to monitor the quality of a process by tracking the number of defective items or occurrences. The p-chart, np chart, and C chart are all examples of attribute charts commonly used in quality control. However, the R-chart is not an attribute chart but rather a control chart used to monitor the variability or range of a process. It is used to identify any significant changes in the dispersion of data points, indicating potential issues with the process.

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11.

These provide support, resources and remove roadblocks. They have more in-depth understanding of the methods, measurements and interpretations of process measurements. They are referred to as:
- A.
  
  Champions
- B.
  
  Master Black Belts
- C.
  
  Steering Committee
- D.
  
  Process Owners
Correct Answer
A. Champions

Explanation
Champions are individuals who provide support, resources, and remove roadblocks in a project. They have a deep understanding of the methods, measurements, and interpretations of process measurements. They play a crucial role in driving the project forward and ensuring its success.

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12.

What are the 3 key attributes of Six Sigma that best summarize why it is a compelling methodology for reducing variation and improving processes in the mind of Senior Management?
- A.
  
  Data Driven, Creative, Streamlined
- B.
  
  Customer Focused, Data Driven, ROI Oriented
- C.
  
  Customer Focused, Statistical Emphasis, Conformity - Driven
- D.
  
  Data Driven, Methodical, ROI Oriented
Correct Answer
B. Customer Focused, Data Driven, ROI Oriented

Explanation
The three key attributes of Six Sigma that best summarize why it is a compelling methodology for reducing variation and improving processes in the mind of Senior Management are: Customer Focused, Data Driven, and ROI Oriented. This means that Six Sigma places a strong emphasis on understanding and meeting customer needs, using data and statistical analysis to drive decision-making and problem-solving, and ensuring that improvements lead to a measurable return on investment. These attributes align with the goals and priorities of senior management, as they prioritize customer satisfaction, evidence-based decision making, and achieving tangible results.

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13.

A company using Six Sigma methodology is operating at a 99.99967% defect-free rate. What is its Sigma Level and failure rate?
- A.
  
  3 Sigma, 3.4 DPMO
- B.
  
  4.5 Sigma, 233 DPMO
- C.
  
  5.0 Sigma, 233 DPMO
- D.
  
  6 Sigma, 3.4 DPMO
Correct Answer
D. 6 Sigma, 3.4 DPMO

Explanation
A Six Sigma methodology aims to achieve a defect rate of 3.4 defects per million opportunities (DPMO), which corresponds to a Sigma Level of 6. This means that the company is operating at a very high level of quality, with a defect-free rate of 99.99967%. The other options do not align with the given defect rate and Sigma Level.

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14.

Select 3 types of Analysis tools to identify root causes/data relationships commonly used in the Six Sigma methodology.
- A.
  
  Control Charts, Pareto Charts, Fish-Bone Diagrams
- B.
  
  Pareto Charts, Capability Indices, Control Charts
- C.
  
  Pareto Charts, Fish-Bone Diagrams, Scatter Plot Diagrams
- D.
  
  Scatter Plot Diagrams, Pareto Charts, Correlation
Correct Answer
C. Pareto Charts, Fish-Bone Diagrams, Scatter Plot Diagrams

Explanation
Pareto Charts are used to identify the most significant factors contributing to a problem, allowing the focus to be directed towards the vital few. Fish-Bone Diagrams, also known as cause-and-effect diagrams, are used to visually display the potential causes of a problem and help identify the root cause. Scatter Plot Diagrams are used to identify the relationship between two variables and determine if there is a correlation between them. These three analysis tools are commonly used in the Six Sigma methodology to identify root causes and data relationships.

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15.

List the 3 key activities - in correct order - for determining if a process is normally distributed, in-control and capable of consistently meeting customer requirements.
- A.
  
  Construct a histogram, Prepare Control Charts, Calculate Capability Indices
- B.
  
  Construct a SIPOC, Prepare Control Charts, Calculate Cp and Cpk
- C.
  
  Calculate the 3 measures of Central Tendency, Calculate Capability Indices, Prepare Control Charts
- D.
  
  Prepare CTQs, Construct Control Charts, Calculate Capability Indices
Correct Answer
A. Construct a histogram, Prepare Control Charts, Calculate Capability Indices

Explanation
The correct answer is to construct a histogram, prepare control charts, and calculate capability indices. Constructing a histogram is the first step in determining if a process is normally distributed. It helps visualize the distribution of data and identify any deviations from normality. The next step is to prepare control charts, which are used to monitor the stability and control of a process. Control charts provide a graphical representation of process data over time and help identify any out-of-control points. Finally, calculating capability indices such as Cp and Cpk helps determine if a process is capable of consistently meeting customer requirements by comparing the process variability with the specification limits.

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16.

A company generates 12,000 orders per month. Each order has the possibility of 4 errors. Approximately how many opportunities for defects are provided during the year?
- A.
  
  1,000,000
- B.
  
  84,000
- C.
  
  144,000
- D.
  
  576,000
Correct Answer
D. 576,000

Explanation
The company generates 12,000 orders per month, and each order has the possibility of 4 errors. To calculate the total number of opportunities for defects provided during the year, we need to multiply the number of orders per month by the number of errors per order and then multiply that by 12 (the number of months in a year). Thus, 12,000 orders per month * 4 errors per order * 12 months = 576,000 opportunities for defects during the year.

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17.

What can you say about Control Limits and Specification Limits?
- A.
  
  There is no difference between the terms; both are used to indicate if a process is in control
- B.
  
  Control Limits are set by the customers; Specification Limits are derived by the process
- C.
  
  Control Limits are derived by the process; Specification Limits are set by the customer
- D.
  
  Control Limits are typically 3 standard deviations from the mean; Specification Limits are typically 3 standard deviations from the target
Correct Answer
C. Control Limits are derived by the process; Specification Limits are set by the customer

Explanation
Control limits and specification limits are two different concepts in statistical process control. Control limits are derived by the process itself and are used to determine if a process is in control or not. They are typically set at a certain number of standard deviations from the mean, often 3 standard deviations. On the other hand, specification limits are set by the customer or the requirements of the product or service. They define the acceptable range of values for a particular characteristic or parameter. Control limits focus on the variation within the process, while specification limits focus on meeting the customer's requirements.

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18.

A process you are monitoring over time exhibits inherent variation. What strategy should you use to manage the process?
- A.
  
  Take immediate action to identify root causes of the common cause variation
- B.
  
  Increase the specification limits to ensure the process is capable
- C.
  
  Continually and gradually improve the stable process
- D.
  
  Stop the process, identify the causes, and eliminate them
Correct Answer
C. Continually and gradually improve the stable process

Explanation
Continually and gradually improving the stable process is the recommended strategy for managing a process that exhibits inherent variation. This approach acknowledges that variation is inherent to the process and focuses on making gradual improvements over time. By consistently analyzing data, identifying areas for improvement, and implementing small changes, the process can be optimized and made more efficient. This strategy recognizes that complete elimination of variation may not be possible, but aims to minimize it and enhance overall performance.

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1
0
19.

Which item below most naturally follows the development of a SIPOC diagram?
- A.
  
  A Process Map
- B.
  
  Voice of the Customer
- C.
  
  Critical-to-Quality Requirements
- D.
  
  Project Charter
Correct Answer
A. A Process Map

Explanation
A Process Map most naturally follows the development of a SIPOC diagram because it provides a detailed visual representation of the steps and activities involved in a process. A SIPOC diagram, which stands for Suppliers, Inputs, Process, Outputs, and Customers, is a high-level overview of a process, while a Process Map delves deeper into the specific activities, tasks, and flow of the process. Therefore, creating a Process Map is the next logical step after developing a SIPOC diagram to gain a more comprehensive understanding of the process.

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20.

If no correlation exists between two variables, then:
- A.
  
  As one variable changes, one cannot predict a value for the other variable
- B.
  
  As one variable increases, the other variable decreases
- C.
  
  As one variable decreases, the other variable decreases
- D.
  
  As one variable decreases, the other variable increases
Correct Answer
A. As one variable changes, one cannot predict a value for the other variable

Explanation
If no correlation exists between two variables, it means that there is no relationship or connection between them. Therefore, as one variable changes, it is impossible to predict or determine a specific value for the other variable. In other words, the two variables are independent of each other, and the change in one variable does not provide any information or indication about the change in the other variable.

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21.

Six Sigma helps to improve:
- A.
  
  Speed and Product Tolerance
- B.
  
  Business growth and risks
- C.
  
  Customer Satisfaction and Profits
- D.
  
  Reputation and reach
Correct Answer
C. Customer Satisfaction and Profits

Explanation
Six Sigma is a methodology that focuses on improving processes and reducing defects or errors. By implementing Six Sigma, organizations strive to meet customer needs and expectations, ultimately leading to increased customer satisfaction. This is achieved by identifying and eliminating process variations that may negatively impact customer satisfaction. Additionally, Six Sigma also aims to improve profitability by reducing waste, increasing efficiency, and enhancing overall product or service quality. Therefore, the correct answer is Customer Satisfaction and Profits.

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22.

Which of the following helps to convey where the data is centered?
- A.
  
  Mean
- B.
  
  Median
- C.
  
  Range
- D.
  
  A and B
Correct Answer
A. Mean

Explanation
The mean helps to convey where the data is centered because it is the average of all the values in a dataset. It is calculated by adding up all the values and dividing by the number of values. The mean represents the central tendency of the data and provides a measure of the average value. Therefore, it is a useful statistic for understanding where the data is centered.

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0
1
23.

The Six Sigma framework for driving speed (or agility) of business is called:
- A.
  
  DMADV
- B.
  
  Lean
- C.
  
  Balance Scorecard
- D.
  
  DMAIC
Correct Answer
A. DMADV

Explanation
DMADV is the correct answer because it is a Six Sigma framework specifically designed to improve and optimize existing processes. The acronym stands for Define, Measure, Analyze, Design, and Verify. This framework focuses on identifying and eliminating defects or inefficiencies in a process, ultimately leading to improved speed and agility in business operations. Lean, Balance Scorecard, and DMAIC are also Six Sigma frameworks, but they are not specifically tailored to driving speed or agility in the same way that DMADV is.

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24.

The Risk Priority Number (RPN) in an FMEA exercise is derived from...
- A.
  
  Severity x occurrence x risk
- B.
  
  Severity x risk x detection
- C.
  
  Occurrence x detection x control
- D.
  
  Severity x occurrence x detection
Correct Answer
D. Severity x occurrence x detection

Explanation
The Risk Priority Number (RPN) in FMEA is calculated by multiplying Severity, Occurrence, and Detection ratings. It quantifies the overall risk associated with potential failure modes. Higher RPN values prioritize addressing high-risk scenarios for enhanced system reliability and safety. By multiplying these three factors together, the RPN provides a numerical value that helps determine which risks should be addressed first in order to prevent or mitigate potential failures or problems.

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0
0
25.

The Voice of the Customer is...
- A.
  
  The number of errors in the process
- B.
  
  A control chart with control limits
- C.
  
  The department's output target
- D.
  
  The customer's specification limits
Correct Answer
D. The customer's specification limits

Explanation
The Voice of the Customer refers to the specific requirements and expectations of the customer regarding a product or service. It represents the customer's specification limits, which are the boundaries within which the product or service should meet the customer's needs and preferences. By understanding and incorporating the Voice of the Customer into the design and development process, organizations can ensure that their products or services align with customer expectations and deliver high levels of satisfaction.

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26.

A planning method designed to show the tasks associated with a project, the personnel responsible for completing the tasks and the timelines allowed.
- A.
  
  Pareto Chart
- B.
  
  Gantt Chart
- C.
  
  MS Project
- D.
  
  Checksheet
Correct Answer
B. Gantt Chart

Explanation
A Gantt Chart is a planning method that visually represents the tasks involved in a project, the individuals responsible for completing those tasks, and the timeframes allocated for each task. It provides a clear and organized overview of the project's progress and helps in scheduling and coordinating activities effectively. This chart is widely used in project management to track and manage project timelines, resources, and dependencies. It allows project managers to identify potential bottlenecks, allocate resources efficiently, and ensure timely completion of tasks.

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27.

A bar chart that depicts the frequencies of numerical or measurement data.
- A.
  
  Sample
- B.
  
  Histogram
- C.
  
  Checksheet
- D.
  
  Process Map
Correct Answer
B. Histogram

Explanation
A histogram is a type of bar chart that is used to represent the frequencies of numerical or measurement data. It displays the distribution of data by dividing it into intervals or bins and showing the number of data points that fall into each bin. This visual representation allows for easy identification of patterns, trends, and outliers in the data. Histograms are commonly used in statistics and data analysis to understand the shape and characteristics of a dataset.

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28.

An improvement process in which a company measures its performance against that of best-in-class companies, determines how those companies achieved their performance levels, and uses the information to improve its own performance.
- A.
  
  Control Chart
- B.
  
  Six Sigma
- C.
  
  Benchmarcking
- D.
  
  Cause and Effect Diagram
Correct Answer
C. Benchmarcking

Explanation
Benchmarking is the correct answer because it involves measuring a company's performance against best-in-class companies and using that information to improve its own performance. This process helps identify areas where the company can make improvements by learning from the practices and strategies of successful companies in the same industry. By benchmarking, the company can set performance targets and implement changes to achieve higher levels of efficiency and effectiveness.

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29.

A control limit...
- A.
  
  Indicates the boundary of the bell curve in a normal distribution
- B.
  
  Indicates that a process event or measurement is likely to fall within that limit
- C.
  
  Indicates that a process event or measurement is likely to fall outside that limit
- D.
  
  Indicates the customer's desired upper or lower performance limits
Correct Answer
B. Indicates that a process event or measurement is likely to fall within that limit

Explanation
A control limit indicates that a process event or measurement is likely to fall within that limit. Control limits are used in statistical process control to define the boundaries of a process's normal variation. They are typically set at a certain number of standard deviations from the process mean and help determine if a process is in control or out of control. When a data point falls within the control limits, it suggests that the process is operating as expected and the variation is within acceptable limits.

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30.

Provides relationship between two variables, and provides a visual correlation coefficient
- A.
  
  Scatter Diagram
- B.
  
  Cause and Effect Chart
- C.
  
  Box Plot
- D.
  
  Trend Line
Correct Answer
A. Scatter Diagram

Explanation
A scatter diagram is a graphical tool that displays the relationship between two variables. It plots data points on a graph, with one variable represented on the x-axis and the other on the y-axis. By visually examining the pattern of the points, we can determine if there is a correlation between the variables. The scatter diagram also provides a visual correlation coefficient, which indicates the strength and direction of the relationship between the variables. Therefore, a scatter diagram is the correct answer as it provides both the relationship between variables and a visual correlation coefficient.

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31.

The objective of Design of Experiments (DOE) is to
- A.
  
  Map all process steps and determine their average duration
- B.
  
  Establish optimal process performance by finding the right settings for key process input variables
- C.
  
  Establish the best graphing method to illustrate process performance
- D.
  
  Determine the mean and standard deviation of a population
Correct Answer
A. Map all process steps and determine their average duration

Explanation
The objective of Design of Experiments (DOE) is to establish optimal process performance by finding the right settings for key process input variables. DOE helps in systematically varying the input variables and analyzing their effects on the output or response variable. By mapping all process steps and determining their average duration, it does not necessarily lead to establishing optimal process performance. Similarly, determining the mean and standard deviation of a population is a statistical analysis technique and not the primary objective of DOE. Additionally, finding the best graphing method to illustrate process performance is a visual representation technique and not the main objective of DOE.

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32.

A six sigma capable process will have..
- A.
  
  Cp = 1.5, Cpk = 2.0 and DPMO = 3.4
- B.
  
  Cp = 2.0, Cpk = 1.5 and DPMO = 6
- C.
  
  Cp = 1.5 Cpk = 2.0 and DPMO = 6
- D.
  
  Cp = 2.0, Cpk = 1.5 and DPMO = 3.4
Correct Answer
D. Cp = 2.0, Cpk = 1.5 and DPMO = 3.4

Explanation
A six sigma capable process will have a Cp value of at least 2.0, indicating that the process is capable of producing products within the specification limits. The Cpk value of 1.5 shows that the process is centered within the specification limits and has a small deviation from the target value. The DPMO value of 3.4 indicates that the process is producing only 3.4 defects per million opportunities, which is well within the six sigma quality level. Therefore, the given answer of Cp = 2.0, Cpk = 1.5, and DPMO = 3.4 satisfies the requirements for a six sigma capable process.

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33.

A pictorial diagram showing possible causes (process inputs) for a given effect (process outputs) It is also referred to as the "Ishikawa diagram" or "fishbone diagram ".
- A.
  
  Standard Deviation
- B.
  
  Cause and Effect Diagram
- C.
  
  Random Experiment
- D.
  
  Scatter Diagram
Correct Answer
B. Cause and Effect Diagram

Explanation
The given correct answer is Cause and Effect Diagram. This diagram, also known as an Ishikawa or fishbone diagram, is a pictorial representation that shows the possible causes (process inputs) for a given effect (process outputs). It is used to identify and analyze the root causes of a problem or an effect in a systematic way. The diagram helps to visually organize and categorize potential causes into major categories or branches, making it easier to identify and address the underlying causes of a problem.

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34.

Six sigma black belt responsibilities include all of the following, except:
- A.
  
  Selecting projects for execution by green belts
- B.
  
  Mentoring green belts
- C.
  
  Training organization staff in six sigma techniques and team work
- D.
  
  Planning the sales and marketing strategy
Correct Answer
D. Planning the sales and marketing strategy

Explanation
The responsibilities of a Six Sigma Black Belt include selecting projects for execution by green belts, mentoring green belts, and training organization staff in Six Sigma techniques and teamwork. However, planning the sales and marketing strategy is not typically part of the Black Belt's responsibilities. This role is usually focused on process improvement and quality management rather than sales and marketing.

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35.

The middle value of a data set when the values are arranged in either ascending or descending order.
- A.
  
  Median
- B.
  
  Mode
- C.
  
  Mean
- D.
  
  Standard Deviation
Correct Answer
A. Median

Explanation
The median is the middle value of a data set when the values are arranged in either ascending or descending order. It is a measure of central tendency that is not affected by extreme values or outliers. The median is useful in situations where the data set is skewed or has a few extreme values, as it provides a more representative value that is not influenced by these outliers.

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36.

One of the most common measures of variability in a data set or population.
- A.
  
  Process capability
- B.
  
  Specification limits
- C.
  
  Mean
- D.
  
  Standard Deviation
Correct Answer
A. Process capability

Explanation
Process capability is a measure of how well a process is able to meet the specifications or requirements. It assesses the ability of a process to consistently produce output within the specified limits. It is commonly used to evaluate and improve the performance of a process by determining if it is capable of producing products or services that meet customer requirements. Therefore, process capability is a relevant measure of variability in a data set or population.

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1
37.

The following are indicators of out of control conditions on a control chart, EXCEPT...
- A.
  
  Six consecutive points, increasing or decreasing
- B.
  
  Fourteen consecutive points that alternate up and down
- C.
  
  Two points in zone c above the mean, followed by two points in zone b below the mean
- D.
  
  One or more points outside the control limits
Correct Answer
C. Two points in zone c above the mean, followed by two points in zone b below the mean

Explanation
The given options describe various indicators of out of control conditions on a control chart. Six consecutive points, increasing or decreasing, fourteen consecutive points that alternate up and down, and one or more points outside the control limits are all indicators of out of control conditions. However, two points in zone c above the mean, followed by two points in zone b below the mean, is not an indicator of out of control conditions.

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38.

A brainstorming method which pits "driving" (positive) and "restraining" (negative) forces that support or oppose an idea.
- A.
  
  Mind Mapping
- B.
  
  Force Field Analysis
- C.
  
  Affinity Diagram
- D.
  
  Brainstorming
Correct Answer
B. Force Field Analysis

Explanation
Force Field Analysis is a brainstorming method that involves identifying and analyzing the driving (positive) and restraining (negative) forces that support or oppose an idea. This technique helps in understanding the various factors that can influence the success or failure of an idea, and allows for a more comprehensive evaluation of the pros and cons. By visualizing these forces, individuals or teams can make informed decisions and develop strategies to maximize the positive forces and minimize the negative ones.

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39.

Is the third step in the 5S Method and is also known as "seiso".
- A.
  
  Sort
- B.
  
  Straightening
- C.
  
  Sustain
- D.
  
  Shine
Correct Answer
D. Shine

Explanation
The third step in the 5S Method is known as "shine." This step involves thoroughly cleaning and inspecting the workplace to ensure that it is free from dirt, dust, and debris. By regularly cleaning and maintaining the work area, it helps to create a safe and organized environment. This step also helps to identify any potential issues or problems that may need to be addressed.

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40.

A measurement concept where a single individual measures the same results each time. Closely linked with Reproducibility.
- A.
  
  Gage R&R
- B.
  
  Accuracy
- C.
  
  Repeatability
- D.
  
  Stability
Correct Answer
C. Repeatability

Explanation
Repeatability refers to the consistency of measurements taken by a single individual. It means that when the same person measures something multiple times, they will get the same or very similar results each time. This concept is closely linked with reproducibility, which refers to the ability to obtain consistent results when the measurement is performed by different individuals or in different conditions. Repeatability is important in ensuring the reliability and validity of measurements, as it helps to determine if the measurement process itself is consistent and reliable.

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41.

What are the 8 Waste?
- A.
  
  Defects, Overproduction, Waiting, Non-Utilized Talent, Transportation, Inventory, Motion, and Extra-Processing
- B.
  
  Quality error, Inefficiency, Inventory, Motion, Overproduction, Waiting, Intellect and Transportation
- C.
  
  Transportation, Inventory, Motion, Waiting, Overproduction, Over Processing, Defects and Skills
- D.
  
  Transportation, Motion, Defects, Variability, Unsafe, Rework, Long Cycle Time and Inventory
Correct Answer
C. Transportation, Inventory, Motion, Waiting, Overproduction, Over Processing, Defects and Skills

Explanation
The correct answer includes the 8 wastes commonly identified in Lean manufacturing: Transportation, Inventory, Motion, Waiting, Overproduction, Over Processing, Defects, and Skills. These wastes represent various inefficiencies and sources of waste within a production process.

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42.

A limited test of a Lean Six Sigma solution to a process. Performed during the Improve Phase, it is an opportunity to test Root Cause Hypotheses while minimizing risks and cost.
- A.
  
  Pilot Test
- B.
  
  ANOVA
- C.
  
  Hypothesis test
- D.
  
  5 Why's
Correct Answer
A. Pilot Test

Explanation
A pilot test is a limited test of a Lean Six Sigma solution to a process. It is performed during the Improve Phase and serves as an opportunity to test Root Cause Hypotheses while minimizing risks and cost. This test allows for the evaluation of the effectiveness of the proposed solution on a smaller scale before implementing it fully. It helps in identifying any potential issues or challenges that may arise and allows for adjustments to be made before rolling out the solution on a larger scale.

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43.

Statistical Process Control (SPC) is a measurement of how well a Process' Outputs meet Customer Requirements.
- A.
  
  True
- B.
  
  False
- C.
  
  Uncertain
- D.
  
  No Answer
Correct Answer
B. False

Explanation
The statement is false because Statistical Process Control (SPC) is not a measurement of how well a process' outputs meet customer requirements. SPC is actually a set of statistical methods used to monitor and control a process to ensure that it operates within specified limits and meets predefined quality standards. It focuses on analyzing process data and identifying and reducing variation in order to improve process performance and quality. While meeting customer requirements is an important goal of process control, SPC itself is not a direct measurement of this.

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44.

Problem Statement is a clear, concise statement about the symptoms of issues being encountered in a process.
- A.
  
  True
- B.
  
  False
- C.
  
  Uncertain
- D.
  
  No Answer
Correct Answer
A. True

Explanation
The given statement is true. A problem statement is a clear and concise statement that describes the symptoms or issues being encountered in a process. It helps to identify and define the problem that needs to be addressed. A well-written problem statement is essential for problem-solving and decision-making processes as it provides a clear understanding of the problem at hand.

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45.

It's the phase of the DMAIC methodology which involves defining the problem or opportunity, determining the voice of the customer/customer requirements, and outlining the project purpose/scope.
- A.
  
  Improve
- B.
  
  Measure
- C.
  
  Define
- D.
  
  Analyze
Correct Answer
C. Define

Explanation
The correct answer is "Define". In the DMAIC methodology, the Define phase is the first step where the problem or opportunity is clearly defined. This involves understanding the voice of the customer and identifying their requirements. Additionally, the project purpose and scope are outlined during this phase. It is a crucial step in the DMAIC process as it sets the foundation for the rest of the improvement project.

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46.

A Work System is...
- A.
  
  Designed to implement a set of processes
- B.
  
  Implemented to encourage change management
- C.
  
  Used by executives to cut costs and increase profits
- D.
  
  Developed by engineers and other technical professionals alone
Correct Answer
A. Designed to implement a set of processes

Explanation
A work system is designed to implement a set of processes. This means that it is created with the purpose of organizing and executing a specific set of tasks or activities. The work system provides structure and guidelines for how these processes should be carried out, ensuring efficiency and effectiveness in achieving the desired outcomes. It encompasses the necessary resources, tools, and procedures to support the execution of the processes, helping to streamline operations and improve overall performance.

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47.

Marvin’s team is launching a new support service network for their cellular phone customers. As the leader, Marvin coordinates all functions of the launch and has sufficient managerial autonomy to make independent decisions. Marvin is considered the:
- A.
  
  Green Belt
- B.
  
  Process Technician
- C.
  
  Process Owner
- D.
  
  Champion
Correct Answer
C. Process Owner

Explanation
Marvin is considered the process owner because he is responsible for coordinating all functions of the launch and has the managerial autonomy to make independent decisions. As the leader of the team, he oversees the entire process of launching the new support service network for cellular phone customers. As the process owner, Marvin has the authority and accountability for ensuring the success of the launch and ensuring that all necessary tasks and activities are carried out effectively and efficiently.

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48.

Rolly is a senior financial manager who has ensured that the company in which he leads the finance department has all the resources necessary to implement Six Sigma methodologies. Rolly is considered a:
- A.
  
  Black Belt
- B.
  
  Champion
- C.
  
  Green Belt
- D.
  
  Process Owner
Correct Answer
B. Champion

Explanation
Rolly is considered a "Champion" because he is a senior financial manager who has provided the necessary resources for implementing Six Sigma methodologies in his company. A Champion is a high-level executive who plays a crucial role in promoting and supporting Six Sigma initiatives within an organization. They provide leadership, allocate resources, and remove any obstacles that may hinder the successful implementation of Six Sigma projects.

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49.

The following are all members of a project selection group EXCEPT...
- A.
  
  Key Executive Supporter
- B.
  
  Champions
- C.
  
  Green Belts
- D.
  
  Master Black Belt
Correct Answer
C. Green Belts

Explanation
The question asks for a member who is not part of the project selection group. Green Belts are actually members of the project selection group, so they are not the correct answer. The other options, Key Executive Supporter, Champions, and Master Black Belt, are all members of the project selection group.

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50.

Which quality management professional is referred to as the father of statistical quality control?
- A.
  
  Walter Shewhart
- B.
  
  B. W. Edwards Deming
- C.
  
  Joseph Juran
- D.
  
  Philip Crosby
Correct Answer
A. Walter Shewhart

Explanation
Walter Shewhart is referred to as the father of statistical quality control because he developed the concept of statistical process control (SPC). SPC is a method that uses statistical techniques to monitor and control processes, ensuring that they are operating within acceptable limits. Shewhart's work laid the foundation for modern quality management practices and his ideas have been widely adopted in industries around the world.

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Quiz Edited by
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Nov 11, 2015

Quiz Created by
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Lean Six Sigma Green Belt Certification Exam

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A Process is operating at 6 Sigma:

A normal Distribution can best be described as:

A process is in-control and stable. Describe the type of variation that exists in the process.

Indicate which are examples of variable data: 1)Length, 2)Weight, 3)QA Result, 4)Dollars, 5)Days

Your control chart shows seven consecutive points on one side of the mean. What does this indicate?

Which Steps should you take when you notice special causes in a control chart?

Select the corect mean, median and mode for the following sample: 4,5,6,1,1,2,5,7,5

Select the key attributes of successful Six Sigma programs. 1) Senior management commitment 2) High ROI projects 3) Projects with short durations 4) Proper funding 5) Well-trained staff 6) Properly scoped projects

An attribute chart can be represented by all of the following EXCEPT...

These provide support, resources and remove roadblocks. They have more in-depth understanding of the methods, measurements and interpretations of process measurements. They are referred to as:

What are the 3 key attributes of Six Sigma that best summarize why it is a compelling methodology for reducing variation and improving processes in the mind of Senior Management?

A company using Six Sigma methodology is operating at a 99.99967% defect-free rate. What is its Sigma Level and failure rate?

Select 3 types of Analysis tools to identify root causes/data relationships commonly used in the Six Sigma methodology.

List the 3 key activities - in correct order - for determining if a process is normally distributed, in-control and capable of consistently meeting customer requirements.

A company generates 12,000 orders per month. Each order has the possibility of 4 errors. Approximately how many opportunities for defects are provided during the year?

What can you say about Control Limits and Specification Limits?

A process you are monitoring over time exhibits inherent variation. What strategy should you use to manage the process?

Which item below most naturally follows the development of a SIPOC diagram?

If no correlation exists between two variables, then:

Six Sigma helps to improve:

Which of the following helps to convey where the data is centered?

The Six Sigma framework for driving speed (or agility) of business is called:

The Risk Priority Number (RPN) in an FMEA exercise is derived from...

The Voice of the Customer is...

A planning method designed to show the tasks associated with a project, the personnel responsible for completing the tasks and the timelines allowed.

A bar chart that depicts the frequencies of numerical or measurement data.

An improvement process in which a company measures its performance against that of best-in-class companies, determines how those companies achieved their performance levels, and uses the information to improve its own performance.

A control limit...

Provides relationship between two variables, and provides a visual correlation coefficient

The objective of Design of Experiments (DOE) is to

A six sigma capable process will have..

A pictorial diagram showing possible causes (process inputs) for a given effect (process outputs) It is also referred to as the "Ishikawa diagram" or "fishbone diagram ".

Six sigma black belt responsibilities include all of the following, except:

The middle value of a data set when the values are arranged in either ascending or descending order.

One of the most common measures of variability in a data set or population.

The following are indicators of out of control conditions on a control chart, EXCEPT...

A brainstorming method which pits "driving" (positive) and "restraining" (negative) forces that support or oppose an idea.

Is the third step in the 5S Method and is also known as "seiso".

A measurement concept where a single individual measures the same results each time. Closely linked with Reproducibility.

What are the 8 Waste?

A limited test of a Lean Six Sigma solution to a process. Performed during the Improve Phase, it is an opportunity to test Root Cause Hypotheses while minimizing risks and cost.

Statistical Process Control (SPC) is a measurement of how well a Process' Outputs meet Customer Requirements.

Problem Statement is a clear, concise statement about the symptoms of issues being encountered in a process.

It's the phase of the DMAIC methodology which involves defining the problem or opportunity, determining the voice of the customer/customer requirements, and outlining the project purpose/scope.

A Work System is...

Marvin’s team is launching a new support service network for their cellular phone customers. As the leader, Marvin coordinates all functions of the launch and has sufficient managerial autonomy to make independent decisions. Marvin is considered the:

Rolly is a senior financial manager who has ensured that the company in which he leads the finance department has all the resources necessary to implement Six Sigma methodologies. Rolly is considered a:

The following are all members of a project selection group EXCEPT...

Which quality management professional is referred to as the father of statistical quality control?