Analyze Tools
These intervals help us determine the likely range of a population parameter
What are Confidence Intervals?
This type of DOE analyzes all possible combinations of factors at the levels tested
What is a Full Factorial DOE?
A common hypothesis test used to confirm a change in the process by comparing before and after sample means
What is a 2 sample t-test?
Inspecting a defective product and incorrectly sending it to the customer is an example of this type of error
What is Type 2 error?
After you complete a Regression analysis you should check for this.
HINT: 4 in 1 graph
What is checking if residuals are normal and random?
The formula below represents which Hypothesis regarding the variance of two processes?
H₁: σ ≠ σ₀
What is the alternate hypothesis?
It is important to ensure your DOE runs follow this order
What is Random?
After project completion, you can use this graph to show that you reduced the variation in your process over time
What is a control chart?
The best tool for analyzing the relationship between a discrete output and discrete input
What is a Chi-Square Test?
This tool can be used to compare the means of 3 or more groups?
What is ANOVA?
Some of the advantages of using a Fractional Factorial DOE over a Full Factorial DOE
What are speed & cost?
Once a process improvement is confirmed and validated, this should be created to document and train on the new process
What is Standard Work or SOPs?
Two variables that have a perfectly strong correlation would have one of these two possible r values
What is 1 or -1?
This letter, also known as significance level, is typically set at a default of 0.05
What is alpha (α)?
This tool can be used as a method to select from several potential solutions or alternatives
What is a Pugh Matrix?
This tool, which is also used in the Measure phase, is performed again after improvements are in place to establish a new process baseline
What is Process Capability?
The Power of a statistical test is irrelevant if a significant result was found
(True or False)
What is True?
This is the conclusion you would make when a Simple Linear Regression Analysis results in a P-value of 0
What is: there is a relationship between the two variables?
You can use these for testing non-linear factor effects in a DOE
What is a Center Point?
Validated improvements that should be replicated to other applicable lines, areas or plants
What are Best Practices?
Increasing the number of Repeats in your DOE will do this to the Power of the experiment
(Increase, Decrease, etc.)
What is Nothing?