Stat-Ease's Design-Expert is the industry standard software in this area. Would have liked to see the author do a little more attribution. These are old ideas

Stat-Ease's Design-Expert is the industry standard software in this area. Would have liked to see the author do a little more attribution. These are old ideas and techniques, and certainly not attributable to this author. It's helpful to visualise the response surface. Diagrams are critical in learning this material.