A Central Composite Design consists of three main components:
1. Factorial Points: The points that form the vertices of a hypercube. They represent the combinations of the high and low levels of the variables. 2. Axial Points: Points that help in estimating the curvature of the response surface. They are placed at a certain distance (α) from the center of the design. 3. Central Point: The midpoint of the design space, often replicated to estimate experimental error and to check the adequacy of the model.
