Category Archives for Six Sigma

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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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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Preventing Six Sigma Failure

Why do Six Sigma projects fail? When we say fail, we mean why the projects don’t achieve the objective which they were supposed to accomplish? There are various reasons for the project failure. However, the following are the top six reasons. 1. Lack of Management Support: The first reason or the prime reason for Six […]

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Value Added vs Non-value Added Activities

​Introduction ​When it comes to running a successful venture, one of the most important things to do is ensuring that you add value to all your activities. Whether you are organizing a charity sale or starting a service business you want to ensure that whatever you offer is actually worth your customer’s investment.Many people know […]

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Top Three Measures of Central Tendency

Three commonly used measures of central tendency are: Mean, Median and Mode. 1. Mean: Mean is also commonly known as the average, e.g., the average income of the country, the average height of people, etc. The mean is the most commonly used measure of central tendency. Formula: Example: Find the mean of 10, 11, 14, […]

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Six Sigma and Change Management

Improvement project always lead to some change.  You cannot improve something by maintaining the status quo. People don’t like change, people like status quo. If anything changes people get disturbed. As a Six Sigma project leader, you need to understand how to manage change. Your ability to management change will decide the success or the […]

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