Figure 57—SSDEVOP identification of optimal grind time and mill speed in the data of Chauhan (2014). The path of these simplexes was overlaid on the response surface that was initially defined in Chauhan (2014), shown in Figure 58. It can be seen that the rotation of the simplex indeed took place in the minimum P80 region, at approximately 90 µm. Figure 58—Overlay of SSDEVOP simplex path and grind P80 contours in the data of Chauhan (2014). In JKTech’s view, SSDEVOP is less preferable to CCRD experimentation. Due to the deliberately incremental changes in variable set-points, SSDEVOP would more often than not, be more time consuming and require more runs. For example, approximately 30 runs were required to identify the P80 minimum in Figure 58, while the original CCRD required only 13 runs. A variant of
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