Section 100 of 103
99. Service Life, Design Life and Remaining Useful Life
Stable section ID: S05-CON-015-SECTION-100 · 29 content blocks
Service Life is the period during which an Asset performs its required functions under actual or anticipated service conditions with acceptable maintenance and risk.
Design Life is the target period adopted during design for evaluating durability, reliability, loads, maintenance, replacement, and lifecycle performance.
Remaining Useful Life (RUL) is the estimated future period during which an existing Asset is expected to continue satisfying defined requirements before repair, replacement, requalification, or retirement becomes necessary.
Design Life is not a guarantee, warranty, or automatic retirement date. Service Life may be shorter or longer depending on actual conditions, quality, exposure, operation, and maintenance.
RUL shall identify:
the assessed Asset and configuration;
evaluation date;
intended service conditions;
available history and evidence;
degradation model or method;
maintenance assumptions;
uncertainty and confidence;
conditions requiring reassessment.
The Building’s life shall not be inferred from the shortest-lived replaceable Component. Different systems may possess intentionally different Design Lives within a coordinated replacement architecture.
- 100. Recycling, Recovery, Disposal and Circular Engineering
- Recycling is the controlled processing of discarded materials into feedstock or products for subsequent use.
Recovery is the extraction of useful materials, Components, energy, information, or other value from an Asset that is no longer used in its current form.
Disposal is the final controlled handling, containment, treatment, or placement of material that cannot be safely or practically reused or recovered.
Circular Engineering is the discipline of designing Assets, Interfaces, records, processes, and supply networks to retain value and reduce waste across repeated lifecycles.
Circular Engineering should prioritize, where safe and practical:
continued use and maintenance;
repair and Upgrade;
Reuse and Requalification;
Refurbishment and Remanufacturing;
Component and material recovery;
Recycling;
controlled Disposal.
Circularity shall not override structural safety, hazardous-material controls, health requirements, or reliable performance.
Claims of recyclability shall identify the material, separation process, available infrastructure, recovery rate, contamination limits, and geographic context. Theoretical recyclability without a practical recovery path shall not be presented as demonstrated circular performance.