Identify the event the number describes
| Claim | Question to ask |
|---|---|
| Design life | Which function and conditions were assumed in the design? |
| Coating durability | What condition or intervention defines the endpoint? |
| Maintenance interval | Which inspection or task is due, and why? |
| Warranty | What obligations, exclusions and remedies are actually stated? |
An illustrative 20-year study period with an inspection milestone at year 5 does not mean the fence is maintenance-free for 20 years. Nor does a five-year warranty establish that the product stops functioning at year five.
Check the object of the claim
Determine whether the statement applies to wire coating, panels, posts, gates or the complete installed system. A claim about one protected component cannot silently become a promise for foundations, moving hardware and site workmanship.
Record the material, protective system, configuration and installation conditions associated with the evidence. Look for the assumed exposure and maintenance regime. If the source concerns another manufacturer or a different environment, it does not substantiate a FencingWise product-life promise.
Ask how the estimate was established
Possible evidence may include relevant test results, exposure records or an engineering assessment. Read what the evidence actually measures. Accelerated test duration should not be converted into field years by an invented universal multiplier.
Where the claim depends on periodic cleaning, inspection or repairs, identify those tasks and their responsible party. Keep realistic access costs in the purchasing comparison rather than presenting them as free conditions attached to the life estimate.
Account for changes during use
Screening, new equipment, altered ground levels and a different operating environment can change the conditions assumed originally. A long service-life statement should not be treated as permission to modify the assembly without review.
Retain a maintenance record with location identifiers and observed condition. After repairs, record what was replaced and the accepted method. The age of the fence is only one part of its current condition.
Compare alternatives on the same horizon
For procurement, use a common study period and show replacement or residual-value assumptions explicitly. If one option has weaker evidence, model an appropriate alternative scenario rather than giving both the same optimistic lifespan.
The lifecycle cost example demonstrates how different maintenance assumptions can reverse a cost decision. The maintainability guide explains how to measure the intervention itself.
An acceptable service-life statement leaves the buyer able to identify the component, endpoint, conditions and supporting evidence. Where those are absent, treat the years as an unsupported claim to resolve before relying on them in an award decision.