Preserve the basis of the result
Identify specimen, exposure, method, units and observed period. A valid study can still be unsuitable for ranking the current shortlist. If candidates were evaluated under unlike conditions, describe the mismatch instead of inventing a normalized score.
Make the next question answerable
A warranty describes commercial coverage and remedy, not a predicted replacement date. Read exclusions and what labor or removal expenses are included. Replace a vague need-more-evidence note with a request naming the exact product, document revision, intended use and party who can resolve it.
Read the boundary around a performance claim
A test result belongs to a specimen, method and set of conditions. Identify those before placing a number in a comparison. Ask whether the proposed product, profile, finish and application match the report’s scope.
Different methods can produce results that should not be ranked in one simple column. Preserve method names, units and conditions. If the basis is not comparable, describe the difference rather than inventing a conversion.
Keep a claim attached to its evidence
| Field | Why it matters |
|---|---|
| Product identity | Prevents a family-level claim being assigned to the wrong product |
| Method and units | Shows what was measured |
| Condition | Defines the tested situation |
| Limitations | States what the result does not establish |
| Project relevance | Connects the evidence to the actual decision |
A fictional comparison receives one report for an uncoated sample and another for a finished product. Before ranking them, identify whether the project proposes those same surfaces and whether the methods answer the same question. Two precise numbers are not necessarily a fair comparison.
Keep unsupported claims visibly separate from source-backed results. A missing report should remain a request for evidence, not become a zero that makes the arithmetic look objective.
Compare the remedy as well as the headline
A long warranty headline and a long service-life forecast are different claims. The FTC’s warranty guide describes warranties as promises concerning a product and correction of problems. Read the actual terms rather than treating the stated period as the date when a deck will need replacement. This is document-comparison guidance, not a legal interpretation of your contract.
| Question | Record for each candidate |
|---|---|
| Covered event | The named defect, change or failure and any stated threshold |
| Proposed use | Whether the document addresses this product, application and purchaser |
| Remedy | Repair, replacement, refund or another stated remedy; retain any schedule or limits |
| Associated work | What the document says about access, removal, disposal, freight and installation labor |
| Claim record | Required documents, notice procedure and named party to contact |
| Open question | A term that needs clarification; do not silently assume coverage |
Fictional comparison: Candidate A offers replacement boards for a covered defect; Candidate B describes a contribution toward material cost. Neither supplied packet resolves removal or reinstallation labor. Record those two remedies separately and keep the associated work unanswered. Do not award either candidate a complete-rebuild benefit simply because the cover pages display similar periods.
Keep the installation requirements, warranty terms and your appearance preferences in separate parts of the record. A surface you prefer can have terms you do not accept. A warranty you accept does not answer whether the proposed layout meets the installation instructions. Resolve each question before treating the shortlist as ready for procurement.
A change in decking priorities
A historical study raises a question about moisture exposure. The selection team requests current candidate-specific evidence instead of assigning the study’s results to every composite board.
Hypothetical planning example.
Technical context
USDA’s composite-board study compared specific laboratory and field exposures. Its results do not establish a universal lifespan for current composite products.
USDA: Laboratory and environmental decay of composite boards