300+ Six Sigma Green Belt FAQs and Answers [Experienced / Freshers]

Six Sigma Green Belt Interview Questions

Question: 1. Name the special types of variations used in Six Sigma?

Answer: The exceptional sorts of variant are — suggest, median, range and mode.

Question: 2. Who paperwork the a part of Six Sigma implementation crew?

Answer: Six Sigma implementation group has 5 key players:

Executive leaders


Master black belt

Black belts

Green belts

Question: 3. What is the difference among the Six Sigma DMAIC and DMADV methodologies?

Answer: The DMAIC methodology, as opposed to the DMADV method, need to be used whilst a product or method is in existence at your employer however isn’t always meeting consumer specification or isn’t acting appropriately.

The DMADV methodology, rather than the DMAIC technique, must be used whilst:

A method is not in presence at your business enterprise and one needs to be evolved

The existing product or method exists and has been optimized (the usage of either DMAIC or not) and still does now not meet the extent of consumer specification or Six Sigma stage

Question: 4. Name some of the Quality Management tools in Six Sigma

Answer: There are a number of pleasant control equipment. Some of them are price-advantage evaluation, CTQ Tree, SIPOC evaluation, COPIS evaluation, and Taguchi strategies. (Name as a minimum 5)

Question: 5. What is supposed by way of COPQ in Six Sigma?

Answer: Definition of Cost of Poor Quality (COPQ): Those prices which might be generated as a result of generating faulty cloth.

Question: 6. What is the definition of DPMO or DPPM?

Answer: DPMO is abbreviated as Defects Per Million Opportunities and

DPPM is abrivated as Defective Parts Per Million.

Question: 7. What is the Pareto Principle?

Answer: The 80:20 ratio of purpose-to-impact have become known as the Pareto Principle.

Question: 8. Can you give an explanation for the concept of fish bone/ Ishikawa diagram?

Answer: It is a visualization tool for categorizing the capability reasons of a hassle with the intention to become aware of its root reasons. Pareto Principle. Pareto principle is a prediction that 80% of results come from 20% of causes.


Question: 9. What is load checking out procedure?

Answer: Load testing is a sort of Performance Testing which determines  process of putting call for on a software program machine or computing device and measuring its manner

Question: 10. What stage of know-how do you’ve got regarding the statistical equipment?

Answer: This have to mirror the talents which you have concerning the statistical equipment with appreciate to Six Sigma. Be sincere whilst answering the query.

Question: 11. What is the distinction between Cpk and Ppk?

Answer: Cpk is procedure capability index, which measures how near a system is walking to its specification limits, relative to the natural variability of the method and Ppk is process performance index, which verifies if the pattern that have been generated from the method is able to assembly Customer CTQs (necessities).

Also Read>> Which is Better — Lean, Six Sigma or Both?

Question: 12. Can you explain preferred deviation?

Answer: Standard deviation suggests the degree of variation in a hard and fast of measurements or a method through measuring the average unfold of records across the mean.

Question: 13. What is technique sigma calculation?

Answer: Process sigma is a measure of the version in a procedure relative to consumer necessities.

Question: 14. What is the 1.5 sigma shift?

Answer: The 1.Five sigma shift adjustment takes into account what occurs to each procedure over many cycles of producing.

Question: 15. What is Regression? When is it used?

Answer: Regression Analysis is a method used to outline dating between an output variable and a fixed of input variables.

There are numerous kinds of regression like Simple Linear Regression, Multiple Linear Regression, Curvilinear Regression, Logit Regression and Probit Regression and so forth., which caters to a diffusion of requirements based on the type of underlying data.

Question: 16. What is the distinction among disorder and defective?

Answer: A illness is any non-conformance of the unit of product with the specified necessities. A faulty is a unit of product which includes one or greater defects.

Question: 17. What is the difference between Process Report and Product Report?

Answer: Process Report is used with continuous data that observe a bell curve distribution, even as Product Report applies to discrete statistics and therefore may be used for all type of distributions.

Question: 18. Explain FMEA

Answer: FMEA is a qualitative and systematic tool, generally created inside a spreadsheet, to help practitioners assume what might cross wrong with a product or manner.

Question: 19. What are X bar and R charts?

Answer: They are a fixed of  charts, that is the maximum typically used statistical system manage technique used to monitor technique conduct and outcome over the years.

Question: 20. Explain Flow charting and brain storming?

Answer: A flowchart is a diagram displaying the sequential steps of an event, method, or workflow. Brainstorming is a technique used to speedy generate creative or original thoughts on or about a method, problem, product,or service.

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Question: 21.  When and by means of whom turned into six sigma evolved ?

Answer: In 1986 Six Sigma became evolved by Motorola.

Question: 22. Explain six sigma’s motive.

Answer: Six sigma’s purpose is to discover the reasons of defects and errors and then take away them in the manufacturing manner.

Question: 23. What is the symbol of Six sigma ?

Answer: Six Sigma has a greek symbol that’s” sigma”. It is the same old deviation applied to degree the variant in the process.

Question: 24. Six sigma uses two key strategies. What are they?

Answer: They are DMAIC and DMADV

Question: 25. What does DMAIC stands for in six sigma ?

Answer: The letters in the abbreviation DMADV stand for outline, degree, analyze, design, confirm,” the steps in the ordered procedure.

Question: 26. What does ?

Answer: DMADV is an abbreviation for define,degree,examine,broaden,affirm

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