| Symbol |
| Definition | Unit | Data and equation | |
| Promoted | Conventional | ||||
| Cchip,i |
| Chipping cost of the supplier i | JPY/loose m3 | Table 1 | Equation (1) |
| xij |
| The amount of wood chip produced by the chipper i or round wood transported from the material landing j | loose m3 | Variable | |
| Ctr,ij1) |
| Transportation cost of the supplier i from the landing j to the demand or the unit transportation cost of round wood from the material landing j in the conventional system | JPY/loose m3 | GIS database | Table 4 |
| D |
| Annual demand | loose m3 | 378,000 | |
| Vi |
| Annual production volume by the chipper i required for its depreciation | loose m3 | Small: 9857e Middle: 35,534e | - |
| Vj |
| Annual amount of material at the material landing j | loose m3 |
|
|
|
| e2) | Chip density coefficient | loose m3/ solid m3 | 2.8 | |
|
| z1) | Annual production rate by thinning in the model area |
| 0.0067 | |
|
| u11) | Rate of treetop volume to stem volume without branches |
| 0.4 | |
|
| u21) | Rate of branches to stem volume |
| 0.23 | - |
|
| Vt,j | Stock volume in the municipality j | solid m3 | GIS database | |