Category Archives for Six Sigma

Nonparametric Tests

Nonparametric Tests in Minitab

A nonparametric test is any statistical procedure where no assumptions are made regarding the distribution of data. The most common types of nonparametric tests include:Kruskal-Wallis TestMann Whitney U TestWilcoxon Signed Ranks TestFriedman’s TestBefore we talk about the Nonparametric Tests, let’s understand what Parametric Tests are.Parametric Tests:These are hypothesis tests that assume that the data being […]

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Special Cause Vs Common Cause Variation

What is the variation?Whatever measurement we take, there is always a variation between these measurements. No two items or measurements are precisely the same. The problem with the variation is that it is the enemy of quality. Variation and quality do not go hand in hand. Variation reduction is one of the significant challenges of quality […]

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Best Six Sigma Certification

Six Sigma is a process improvement approach. Six Sigma was invented by Motorola way back in 1985. This approach has stood the test of time and is still widely used by organizations even after 35 years of its invention. This process improvement methodology can be used in any industry. The focus of Six Sigma is to […]

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Defects per million opportunities (DPMO)

In Six Sigma, Defects per Million Opportunities (DPMO) is the measure of the process performance. Defects per Million Opportunities (DPMO) Defect vs Defective: Defects per Unit: Defect Opportunity: Defect per Opportunity (DPO) Defect per Million Opportunities (DPMO) Sigma Level Defect vs Defective: Let’s first understand the difference between the defect and defectives.   Defect:   […]

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ASQ® CSSGB [2020] | How to pass your Six Sigma Green Belt Exam?

Are you looking for the American Society for Quality (ASQ) Certified Six Sigma Green Belt (CSSGB) certification? ​​Passing ASQ CSSGB Exam in the first attempt Types of Six Sigma Certifications: ​ASQ CSSGB Exam Preparation Course: ​Applying for the exam: How to prepare for the exam? ​Typical Cost of Certification: Types of Six Sigma Certifications: ​Currently […]

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Six Sigma Certification – ASQ® or IASSC?

Many of my Six Sigma Green Belt and Six Sigma Black Belt students have asked me these questions: Which certification should I go for ASQ(American Society for Quality) or IASSC (International Association for Six Sigma Certifications)? Which of these to certificates is most valued – ASQ or IASSC? Let’s understand a few key facts before […]

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Common Probability Distributions

 1. Normal Distribution: ​Where: μ  = Meanσ  = Standard Deviation π ≈ 3.141e ≈ 2.718 ​2. Binomial Distribution: ​Where: p = Probability of successq = Probability of failure =  1−p​ n = Number of trialsP(x) = Probability of x successes in n trials ​3. Poisson Distribution: ​Where: m = Probability of successP(x) = Probability of […]

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