Acronyms & Symbols
k
What are the number of factors?
This design is recommended when K < 4.
What is the Full Factorial?
Three types of graphs that are helpful to determine the significance of the factors.
What is the Main Effects Plot, Pareto Chart, and Interaction Plot?
Used to predict input values for specific responses.
What is Response Optimizer?
9 consecutive points located here will signal a potential special cause.
What is on one side of the centerline?
DAILY DOUBLE
RPN
Used to increase power with fewer runs and can detect curvature
What are center points?
When this is true, p-values cannot be estimated. (prior to reducing)
What is a sample size of 1?
The confidence of the response based on a specific single input.
What is the Prediction interval?
In MSAs, these 2 sources of variation represent the total measurement error.
What is repeatability and reproducibility?
COPQ
What is Cost of Poor Quality?
When 2 factors or interaction terms are set at identical levels.
What is aliasing (or confounding)?
Indicates how well a regression model predicts responses for new observations
What is R-sq (Pred)?
This transformation is usually appropriate for cycle time data.
What is the log transformation?
Document links KPOVs to KPIVs
What is the Built-in Quality Control Plan?
TPM
What is Total Productive Maintenance?
In a Res V design, the Main factors are confounded with this.
What are the 4-factor and higher order interactions?
Removing one factor or interaction at a time.
What is the appropriate method for reducing a model?
Power > 80%.
This minimizes the risk to miss a desired effect?
4 stratifying factors used in the Data Collection Phase.
What is Who, What, Where and When?
2^5-1
What is a 2-level, 5 factor, half-fraction design?
This design is especially useful to screen quantitative factors with 3 levels.
What is a Definitive Screening Design?
The acceptable level of multicollinearity
What is VIF < 5?
These 2 tools in DOE PRO are used to visualize the shape of our models.
What are surface, and contour plots
This is short term versus long term process capability.
What is the difference between Cpk and Ppk?
This DOE design is commonly used in response surface methodology and includes factorial points, axial points, and center points.
What is a central composite design