Sequential experimentation is a key component of many DOE endeavors. This is especially true if you have a need to fully optimize the solution using response surface methods involving central composite designs (CCD).
The path of steepest ascent (or descent) defines the most likely path of increasing (or decreasing) response values based on an initial 2K factorial design that contains no evidence of curvature. The points on this path are defined by changing each factor proportionally based on the size and sign of the coded coefficients. These design points are then investigated. The point at which the response changes direction marks the location for a new 2K design. When a 2K design shows significant curvature, axial points are typically added to the design to create a CCD to model the response surface.
|When to Use||Purpose|
|Mid-project||Define a sequential experimentation strategy (DOEs) to quickly find the values of the process inputs that maximize (or minimize) the process output.|
Factor coefficients and settings from a 2K designed experiment (DOE).