Scale of defect impact on the time and cost of repairing the pipe (It/Ic)
| Pipe criteria . | It . | Ic . | |
|---|---|---|---|
| Depth (m) | 0–1 | 1 | 1 |
| 1–3 | 2 | 2 | |
| 3–6 | 3 | 3 | |
| >6 | 4 | 4 | |
| Location | Road | 1 | 4 |
| Sidewalk | 2 | 3 | |
| Built | 3 | 2 | |
| Vegetation | 4 | 1 | |
| Defect impact on the structural quality of the pipes (Iq) | Iq=1 | 1 | 1 |
| Iq=2 | 2 | 2 | |
| Iq=3 | 3 | 3 | |
| Iq=4 | 4 | 4 | |
| Iq=5 | 5 | 5 | |
| Diameter (mm) | 200–300 | 1 | 1 |
| 400–500 | 2 | 2 | |
| 600–700 | 3 | 3 | |
| 800–900 | 4 | 4 | |
| Pipe criteria . | It . | Ic . | |
|---|---|---|---|
| Depth (m) | 0–1 | 1 | 1 |
| 1–3 | 2 | 2 | |
| 3–6 | 3 | 3 | |
| >6 | 4 | 4 | |
| Location | Road | 1 | 4 |
| Sidewalk | 2 | 3 | |
| Built | 3 | 2 | |
| Vegetation | 4 | 1 | |
| Defect impact on the structural quality of the pipes (Iq) | Iq=1 | 1 | 1 |
| Iq=2 | 2 | 2 | |
| Iq=3 | 3 | 3 | |
| Iq=4 | 4 | 4 | |
| Iq=5 | 5 | 5 | |
| Diameter (mm) | 200–300 | 1 | 1 |
| 400–500 | 2 | 2 | |
| 600–700 | 3 | 3 | |
| 800–900 | 4 | 4 | |