01Define the term for your order
State whether the team uses “golden sample,” “approved sample,” “limit sample” or another term, and define it in the order documents. Distinguish a target reference from an allowable-boundary sample and from a tested specimen. Avoid assuming that supplier and buyer use the same informal language or approval authority.
02Create an unambiguous identity
Assign a sample ID and link it to buyer SKU, supplier model, product revision, variant, manufacturing site, sample stage, approval date and approvers. Record serial, batch or component references where relevant. Add photographs of all sides, labels, accessories and package contents so a later team can detect accidental substitution.
03Write approval scope and exclusions
List each characteristic the sample controls and point to the method used where measurement matters. Also list provisional parts, unresolved comments, destructive-test status and characteristics governed only by drawings, specifications or external evidence. A visually approved housing does not automatically approve internal construction, battery, material composition or compliance.
04Create matched controlled counterparts
Where practical, approve buyer and supplier units from the same sample stage and record their relationship. Use tamper-evident labels, signatures or seals appropriate to the item without covering comparison areas. If exact duplicates are impossible, document the hierarchy and which reference controls a disagreement. Digital photos support the record but do not always preserve color, texture, sound or fit.
05Set custody and preservation rules
Name storage location, custodian, permitted handling, environmental needs and access log. Protect the reference from sunlight, moisture, dust, deformation, battery aging, scent loss, wear and unauthorized demonstration as applicable. Record when it leaves storage and inspect its condition on return. Do not keep an unsafe or damaged powered sample in ordinary storage.
06Standardize comparison
Define lighting, distance, orientation, conditioning, instruments, fixtures, settings and units for relevant comparisons. Train inspectors on written criteria and boundary samples instead of relying on memory. If buyer and supplier results differ, compare methods and reference condition before declaring one observer wrong. Record objective results and photos against the sample ID.
07Review, replace and retire visibly
Set review triggers for age, damage, software change, material change, new production site or approved revision. A replacement requires the same identity and approval discipline as the original. Mark superseded references as retired, separate them from active use and retain the history needed to understand earlier orders, complaints and change decisions.