Table 11 Functional characteristics and risk assessment indicators: a statistical reference for industrial maintenance
From: Survival analysis framework for sewer failure time: evidence from Hong Kong
Categories | Subcategories | Types | Risk characteristics | Maintenance strategies |
|---|---|---|---|---|
Functional factors | Â | Stormwater | Earlier warning threshold at 45 years Significant increase after 60 years | Conduct basic monitoring until age 60 Increased inspection frequency after age 60 |
Foul sewer | Warning threshold reached at 47 years More moderate risk progression | Maintain stable maintenance cycles |
