Simplex Screening Designs

Vertices: required points to estimate the linear mixture terms

Axial check blends: points half-way between the centroid and the vertices to improve linear term estimates

Constraint plane centroids: points directly opposite the vertices to improve linear term estimates

Additional centroid points: points in the exact center used to estimate curvature

Blocks: for each block a centroid run will be added to estimate block effects

Points needed for blocks: number of centroid points used to estimate block effects

Total: sum of vertices, axial check blends, constraint plane centroids, and additional center points.