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The Six Sigma Black Belt Exam certifies professionals who can explain the six sigma philosophies and principles. This exam is beneficial to all kinds of people on various professional levels like managers, engineers, quality professional and those who have a minimum of 2 years working experience. Take this test to know how prepared you are for the main exam.
Questions and Answers
1.
What is the main purpose of six sigma?
A.
Repair defects
B.
Decrease variation
C.
Manage projects
D.
Deduce standard variations
Correct Answer
A. Repair defects
Explanation The main purpose of six sigma is to repair defects. Six sigma is a methodology that aims to improve the quality of processes by identifying and eliminating defects or errors. It focuses on reducing variation and improving efficiency to ensure that products or services meet or exceed customer expectations. By repairing defects, organizations can enhance customer satisfaction, increase productivity, and reduce costs.
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2.
Which will have the highest influence on consumer's perception of product quality?
A.
Result of audit
B.
Service and repair policies
C.
Financial performance of the company
D.
Standard of the industry
Correct Answer
B. Service and repair policies
Explanation Service and repair policies have the highest influence on consumer's perception of product quality because these policies determine how a company handles issues and problems with their products. If a company has strong and reliable service and repair policies, consumers are more likely to perceive the product as high quality because they know that if something goes wrong, the company will provide efficient and satisfactory solutions. On the other hand, if the service and repair policies are weak or non-existent, consumers may perceive the product as low quality because they have concerns about the company's ability to address any issues that may arise.
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3.
According to Juan, anyone is a customer of a product or service as long as that person does what?
A.
Uses it
B.
Is affected by it
C.
Buys it
D.
Recommends it
Correct Answer
B. Is affected by it
Explanation Juan believes that anyone can be considered a customer of a product or service as long as they are affected by it. This means that even if someone does not necessarily use or buy the product, they can still be considered a customer if they are impacted or influenced by it in some way.
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4.
When calculating DPMO, which of the following formulas should you use?
A.
DPU/DPO
B.
DxVxOP
C.
DPOx1,000,000
D.
D/TOP
Correct Answer
C. DPOx1,000,000
Explanation When calculating Defects Per Million Opportunities (DPMO), the correct formula to use is DPOx1,000,000. DPO stands for Defects Per Opportunity, which is the number of defects divided by the total number of opportunities. Multiplying DPO by 1,000,000 is necessary to convert it into a per million scale, which is the standard unit for DPMO calculations. This formula helps in quantifying the defect rate in a process or system, allowing for comparison and analysis across different processes or organizations.
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5.
Irrespective of the population from which the data is drawn, sampling means distribution is what when sufficiently large?
A.
Normally distributed
B.
Unevenly distributed
C.
Skewed towards the standard deviation
D.
Skewed towards the outliers
Correct Answer
A. Normally distributed
Explanation When the sample size is sufficiently large, the sampling means distribution tends to follow a normal distribution. This is known as the Central Limit Theorem, which states that regardless of the population distribution, the sampling distribution of the mean will approach a normal distribution as the sample size increases. This means that the majority of the sample means will be clustered around the population mean, with fewer means deviating further away from the mean. Therefore, the correct answer is "Normally distributed" in this case.
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6.
Project scope can be limited to the following except what?
A.
Policies and terms
B.
Financial projects
C.
Geography
D.
Organizational structures
Correct Answer
C. GeograpHy
Explanation The project scope can include various aspects such as policies and terms, financial projects, and organizational structures. However, geography is not typically a factor that limits the project scope. Geography refers to the physical location or spatial distribution of resources, which may not directly impact the boundaries or objectives of a project. Therefore, it is not considered a limiting factor when determining the scope of a project.
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7.
What is the full meaning of DMAIC?
A.
Define, Measure, Analyze, Investigate, Control
B.
Define, Measure, Analyze, Improve, Control
C.
Definition, Measurements, Analysis, Improvements, Control
D.
Definition, Measurements, Analysis, Inestigations, Control
Correct Answer
B. Define, Measure, Analyze, Improve, Control
Explanation The correct answer is "Define, Measure, Analyze, Improve, Control". DMAIC is a problem-solving methodology used in Six Sigma projects. It involves defining the problem, measuring the current process, analyzing the data to identify root causes, making improvements to the process, and implementing controls to sustain the improvements. The answer option "Investigate" is not part of the DMAIC acronym.
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8.
When the observed outcome of the dependent variable can only have two values such as 0 and 1 or success and failure, what is the logistic regression?
A.
Nominal
B.
Binomial
C.
Multinomial
D.
Ordinal
Correct Answer
B. Binomial
Explanation Logistic regression is a statistical model used when the dependent variable has two possible outcomes, such as success and failure or 0 and 1. It is a type of regression analysis that predicts the probability of the dependent variable belonging to a certain category based on the values of the independent variables. In this case, the correct answer is "Binomial" because logistic regression is specifically designed for binary outcomes.
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9.
P charts are usually based on what?
A.
Erlang distribution
B.
Normal distribution
C.
Binomial distribution
D.
Progressive distribution
Correct Answer
B. Normal distribution
Explanation P charts, also known as proportion charts, are statistical control charts used to monitor the proportion of nonconforming items in a process. They are typically based on the assumption that the data follows a normal distribution. This assumption allows for the calculation of control limits and the identification of any deviations from the expected proportion of nonconforming items. By using the normal distribution as a basis, P charts provide a reliable method for monitoring and improving process quality.
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10.
Six Sigma level can be achieved by using six levels of validation before release.
A.
Always true
B.
True, but not always
C.
Completely false
D.
Depends on the type of validation
Correct Answer
D. Depends on the type of validation
Explanation The statement "Six Sigma level can be achieved by using six levels of validation before release" is not always true. The achievement of Six Sigma level depends on the type of validation being used. While using six levels of validation can contribute to achieving Six Sigma level in some cases, it does not guarantee it in all situations. The effectiveness of validation methods may vary depending on the specific requirements and context of the project. Therefore, the statement depends on the type of validation being used.
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