Category Archives for Six Sigma

Seven Basic Quality Tools

Process improvement is an integral part of manufacturing. It is also a critical component of quality control. Identifying problems early and correcting them before they become costly issues is the key to success. The origin of these tools can be traced back to the 15th century. This was when the monk named Benkei was said to […]

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Defect vs. Defective

What is the difference between defect and defective?Defect means not meeting a specific requirement or the specification, or failing to achieve a specific customer/client CTQ. A product could have multiple defects. Some of these defects might not even be noticeable by the client. These defects do not functionally affect the performance of the product, still […]

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Accuracy vs. Precision

What is the difference between accuracy and precision?Accuracy refers to the closeness between measurements and their expected or true value (The farther a measurement is from its expected or the true value, the less accurate it is.) Precision pertains to the closeness of measurements to one another.Statistical scheme of accuracy and precision on targetOne way that […]

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Six Sigma vs. Lean

What is the difference between Lean and Six Sigma? Lean and Six Sigma are two different frameworks that can be used to improve the effectiveness of a given process. Lean is focused on customer value and waste reduction, while Six Sigma focuses on variation reduction and statistical analysis.LeanSix SigmaFocus is on:Waste reductionVariation reductionLeads to:Cycle time […]

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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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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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