Experimental design by fractional factorial method.
| no. | Lov | Ltp | Pac | Tac | Ttw | Stp |
|---|---|---|---|---|---|---|
| 1 | Lov-1 | Ltp-1 | Pac-1 | Tac-2 | Ttw-2 | Stp-2 |
| 2 | Lov-2 | Ltp-1 | Pac-1 | Tac-1 | Ttw-1 | Stp-2 |
| 3 | Lov-1 | Ltp-2 | Pac-1 | Tac-1 | Ttw-2 | Stp-1 |
| 4 | Lov-2 | Ltp-2 | Pac-1 | Tac-2 | Ttw-1 | Stp-1 |
| 5 | Lov-1 | Ltp-1 | Pac-2 | Tac-2 | Ttw-1 | Stp-1 |
| 6 | Lov-2 | Ltp-1 | Pac-2 | Tac-1 | Ttw-2 | Stp-1 |
| 7 | Lov-1 | Ltp-2 | Pac-2 | Tac-1 | Ttw-1 | Stp-2 |
| 8 | Lov-2 | Ltp-2 | Pac-2 | Tac-2 | Ttw-2 | Stp-2 |