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
Ask the supplier to identify whether its statement covers the wire coating, finished panel, post, moving gate hardware or complete installation. Connect the claim to the offered material and protective system, not to a general brochure or another manufacturer’s data. For a mixed-source package, separate the declarations where necessary instead of extending the strongest component claim to every item on the order.
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
Request the basis of the estimate and the conditions under which it applies. Relevant exposure records, test results or engineering assessments should identify their product and environment; a laboratory duration alone does not establish outdoor years. Where the claim depends on cleaning or repair, include those tasks and access requirements in the comparison so the purchasing decision carries the same maintenance assumptions as the promised outcome.
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.