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A Quality Control Plan is a documented description of the activities needed to control a process or product. The objective of a QCP is to minimize variation.
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The Weibull distribution is applicable to make population predictions around a wide variety of patterns of variation.
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The t Distribution and t-test is used to test population means when small samples are involved.
Continue reading "t Distribution, How To Test Population Means"
The Poisson distribution is used to calculate the probability of occurrence of an event in a population.
The normal distribution is used to determine the probability of an event regarding a population and to make predictions about such population based on estimates of its mean and standard deviation.
The Lognormal distribution is used to describe data associated to life spans, reaction times, income distributions, economic data, etc.
In variance analysis, the F distribution is used with F tests to verify if the groups tested are from same mean populations.
Use the Chi-square distribution test to determine whether there is a significant relationship between two categorical variables.
The Binomial Distribution is used to calculate the probability of r occurrences in n trials when the probability of occurrence of an event is constant for each of n independent trials of the event.
Rolled Throughput Yield is used to calculate the probability that a unit of output will be defect free after a series of k process steps.
Continue reading "Rolled Throughput Yield - The Ultimate Measure Of Process Quality"
What’s critical-to-satisfaction, $$$$, cycle-time, defects, etc.? You need to have a reason to initiate the Six Sigma process.
Continue reading "Six Sigma Process - 12 Step Detailed Roadmap"
In addition to taking advantage of the free Six Sigma courses, visit the repository of free Six Sigma tools and download hundreds of free ready to use templates.
Although the cost of obtaining Six Sigma Certification has plummeted, SALARIES REMAIN HIGH
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Free Six Sigma Training is now available for individual and corporate use. Free world-class interactive training courseware with built-in tools and templates.
So what is Six Sigma? If you’re familiar with Six Sigma then undoubtedly you have heard the financial stories.
Six Sigma projects are key to generating return on investment and the organizational momentum and appetite for more.
Getting lean and eliminating waste will deliver the following benefits.
Variation is the enemy of most processes. Popular measures include the range, variance, and standard deviation
Continue reading "Measures of Variation, What's Your Process Spread?"
Quality audits are a form of Quality Control, they are inspections. They are planned and documented assessments.
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In order to get your processes to work right you must follow four basic rules.
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Two Way ANOVA is used to analyze the effect of two random factors on a critical-to characteristic.
Continue reading "Two Way ANOVA, The Most Popular Form Of DOE"
The test sensitivity is how much observable difference needs to be detected in a hypothesis test.
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N Way ANOVA is used to analyze the effect of N fixed factors on a CT characteristic
An operational definition is one that people can do business with. It has same meaning to vendor as to purchaser, same meaning yesterday and today.
Continue reading "Operational Definition, The Same Meaning Yesterday, Today And Tomorrow"
Lean Manufacturing history traces back to Ford’s moving production line. Car assembly time decreases by 90% and he quickly becomes one of the richest men in the world.
Two group decision making tools frequently used by quality improvement teams to make decisions are Multivoting and Nominal Group Technique (NGT).
In the beginning of implementing a process improvement initiative, leadership typically identifies problem areas and nominates the first processes to be investigated and improved.
The probability plot is a graphical technique used for assessing whether or not a data set follows a given distribution such as the normal or Weibull.
Residual plots (also known as error) show the difference between the data points and the fitted value.
Linear regression is used to estimate the parameters of an equation relating a particular variable (dependent variable or "Y") to another variable (independent variable or "X").
Good data collection practice means collecting only the data that we intend to use, and not wasting time with not-useful data gathering.
The u Chart plots defects per unit data collected from subgroups of equal or unequal size.
Continue reading "u Chart - Understand Defects Per Unit Tracking"
Measures of Location, Mean, Median and Mode
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A Quality Assurance Plan is a single point document specifying what processes, procedures and resources will be applied to meet the requirements.
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Non-parametric tests do not rely on data belonging to any particular distribution.
Companies must find a ways to do it better, faster and cheaper! Transitioning to a Lean Enterprise is often the best solution.
Using a Histogram to determine if a process is capable of meeting customer requirements.
THOUSANDS of Corporate Black Belts have been TRAINED and CERTIFIED with this Six Sigma PowerPoint Material.
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Rational subgrouping is used to collect data in such a manner as to have the best possible representation of an unknown process state.
Continue reading "Rational Subgrouping - Collecting Data To Maximize The Output Information"
DFSS is a flexible process in that it can be selectively equipped from the large array of tools available in the master toolbox.
The 1.5 sigma shift and drift takes into account the natural behavior of most processes to vary with time.
Continue reading "Average Process.Sigma Shift And Drift Over Time"
ANOVA is used to compare the means of two or more populations on a continuous CT characteristic.
Kano model, how to easily link customer requirements to customer satisfaction.
An Interaction Plot is used to visualize the presence of interactions of the factors.
Analysis of continuous data is dominated by ANOVA and DOE. Chi-Square and contingency table analysis are equally important discrete data tools.
To improve the process, you must find what causes the product or service to be unsatisfactory, this is the root cause,
Continue reading "Root Cause - How To Identify The Real Cause Of Problems"
May 10, 16 09:24 PM
A Quality Control Plan is a documented description of the activities needed to control a process or product. The objective of a QCP is to minimize variation.
May 10, 16 08:49 PM
The Largest Collection of Free Six Sigma Tools and Training on the Web!
May 10, 16 07:28 PM
The Weibull distribution is applicable to make population predictions around a wide variety of patterns of variation.