| 4 | Reliabilityb | Technology is sensitive to changes in the influent operating conditions (e.g., toxic matter, shock loads, etc.). The impact of the changes is irreversible | L | 1 |
| Technology is sensitive to changes in the influent operating conditions (e.g., toxic matter, shock loads, etc.); however, the changes’ impact is reversible. | M | 2 | ||
| Technology is independent of the influent operating conditions. | H | 3 | ||
| 5 | Odor/gaseous emissions | Odor outside the facility boundaries | L | 1 |
| Odor inside the facility boundaries, only | M | 2 | ||
| No odor outside the facility boundaries | H | 3 | ||
| 6 | Complexity | Complex system and/or Not-well established technology | L | 1 |
| Moderately complex technology and/or well established | M | 2 | ||
| Simple technology | H | 3 |