Table 1. Box-Behnken design for optimization of brown rice replacement and SHS1) condition
| Run | Brown Rice Replacement (%) | SHS Temp. (°C) | SHS Heating Time (s) | Responses2) |
| X1 | X2 | X3 | Y1 | Y2 |
| 1 | 0(-1) | 200(-1) | 180(0) | 4.42 | 283.33 |
| 2 | 0(-1) | 250(0) | 120(-1) | 4.47 | 281.81 |
| 3 | 0(-1) | 250(0) | 240(1) | 3.21 | 356.35 |
| 4 | 0(-1) | 300(1) | 180(0) | 3.11 | 363.92 |
| 5 | 15(0) | 200(-1) | 120(-1) | 4.66 | 264.23 |
| 6 | 15(0) | 200(-1) | 240(1) | 3.98 | 314.66 |
| 7 | 15(0) | 250(0) | 180(0) | 3.04 | 371.22 |
| 8 | 15(0) | 250(0) | 180(0) | 3.01 | 375.48 |
| 9 | 15(0) | 250(0) | 180(0) | 3.05 | 374.29 |
| 10 | 15(0) | 300(1) | 120(-1) | 3.18 | 357.21 |
| 11 | 15(0) | 300(1) | 240(1) | 3.07 | 365.87 |
| 12 | 30(1) | 200(-1) | 180(0) | 3.41 | 338.87 |
| 13 | 30(1) | 250(0) | 120(-1) | 3.35 | 346.20 |
| 14 | 30(1) | 250(0) | 240(1) | 3.08 | 367.56 |
| 15 | 30(1) | 300(1) | 180(0) | 3.27 | 355.08 |
SHS: superheated steam
Y1: hardness (Kg/cm2), Y2: water uptake (%)