Table 4.
The experimental design
| Block | Run (samples) | Space type | Composition factors | Process factors | Abbreviation by minima (m), Maxima (M) and average (a) values | |||
|---|---|---|---|---|---|---|---|---|
| A: Oil | B: Starch | C: Protein | D: Stirring velocity | E: Stirring duration | ||||
| % | % | % | Rpm | Min | ||||
| Block 1 | 1 | Vertex | 10 | 0 | 0 | 20,000 | 5 | m, m, m, M, m |
| Block 1 | 2 | Center | 15 | 0.75 | 1 | 15,000 | 12.5 | a, a, a, a, a |
| Block 1 | 3 | Vertex | 20 | 0 | 2 | 10,000 | 20 | M, m, M, m, M |
| Block 1 | 4 | Vertex | 20 | 0 | 0 | 10,000 | 5 | M, m, m, m, m |
| Block 1 | 5 | Vertex | 20 | 0 | 2 | 20,000 | 5 | M, m, M, M, m |
| Block 1 | 6 | Vertex | 20 | 1.5 | 0 | 20,000 | 5 | M, M, m, M, m |
| Block 1 | 7 | Vertex | 10 | 1.5 | 2 | 10,000 | 5 | m, M, M, m, m |
| Block 1 | 8 | Vertex | 10 | 1.5 | 0 | 20,000 | 20 | m, M, m, M, M |
| Block 2 | 9 | Center | 15 | 0.75 | 1 | 15,000 | 12.5 | a, a, a, a, a |
| Block 2 | 10 | Vertex | 10 | 1.5 | 2 | 20,000 | 5 | m, M, M, M, m |
| Block 2 | 11 | Vertex | 20 | 0 | 0 | 20,000 | 20 | M/m/m/M/M |
| Block 2 | 12 | Vertex | 10 | 0 | 2 | 10,000 | 5 | m/m/M/m/m |
| Block 2 | 13 | Vertex | 10 | 1.5 | 0 | 10,000 | 5 | m/M/m/m/m |
| Block 2 | 14 | Vertex | 10 | 1.5 | 2 | 10,000 | 20 | m/M/M/m/M |
| Block 2 | 15 | Vertex | 20 | 1.5 | 2 | 10,000 | 5 | M/M/M/m/m |
| Block 2 | 16 | Center | 15 | 0.75 | 1 | 15,000 | 12.5 | a/a/a/a/a |
| Block 3 | 17 | Vertex | 20 | 1.5 | 0 | 10,000 | 20 | M/M/m/m/M |
| Block 3 | 18 | Vertex | 10 | 0 | 2 | 20,000 | 20 | m/m/M/M/M |
| Block 3 | 19 | Vertex | 10 | 1.5 | 0 | 20,000 | 5 | m/M/m/M/m |
| Block 3 | 20 | Vertex | 20 | 1.5 | 0 | 10,000 | 5 | M/M/m/m/m |
| Block 3 | 21 | Vertex | 20 | 0 | 0 | 20,000 | 5 | M/m/m/M/m |
| Block 3 | 22 | Vertex | 20 | 0 | 2 | 10,000 | 5 | M/m/M/m/m |
| Block 3 | 23 | Vertex | 10 | 0 | 0 | 10,000 | 20 | m/m/m/m/M |
| Block 3 | 24 | Vertex | 20 | 1.5 | 2 | 20,000 | 20 | M/M/M/M/M |
Five quantitative factors at 2 levels allowing the Design Expert to generate 21 "matrix" tests and 3 points in the center, all divided into 3 blocks. These 21 "matrix" tests are sufficient to estimate the constant, the two degrees of freedom of the block effect, the 5 1st order coefficients and the 10 2nd order interactions under satisfactory orthogonally conditions (the VIF do not exceed 1.14). This is likely an optimal plan