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Central Composite

In statistics, a central composite design is an experimental design, useful in response surface methodology, for building a second order (quadratic) model for the response variable without needing to use a complete...

Center Points

Center points serve as fundamental concepts across mathematics, geometry, engineering, and everyday applications. Whether you’re designing architectural layouts, solving geometric problems, or planning urban developments, understanding center points becomes...

C Chart and U Chart: When to Use Each and How They Work

Not all quality problems show up as measurements. Sometimes what matters is not how long a shaft is or how heavy a component is — it is how many defects were found on a circuit board, how many errors appeared in a document, or how many paint blemishes were recorded on...

Box-Behnken Design: What It Is, When to Use It, and How It Works

You have identified the key factors affecting your process. You know from prior screening experiments which variables have the most influence. Now you need to find the optimal settings — the specific combination of factor levels that produces the best outcome. This is...

Block

A Block Diagram is used to assess the effect of input variables or factors on your output (or response). First, identify any factors that could have a significant impact on your response variable. Learning how to draw a block diagram is a lot easier than it...