A supplier reports that the specified material is unavailable and offers an equivalent. That may be a workable proposal, but the word equivalent does not tell you which requirements have been compared.
Return to the approved specification. Identify the functions that matter for the product: dimensions, appearance, compatibility, durability or relevant regulatory requirements. Some need qualified assessment or testing; a buyer’s visual check cannot establish every property.
Ask for a written comparison of the original and proposed materials, including what changes and what remains unverified. Avoid asking only whether the substitute is better. Better for cost may not mean suitable for the intended use.
In a fictional display-stand order, a surface finish could look similar in a photograph while interacting differently with the cleaning method used at the destination. The appropriate question is whether the proposed finish meets the agreed requirement, with evidence suitable to that claim.
- Identify the affected product and specification version.
- Record the reason for the proposed substitution.
- Name the person authorized to review it.
- Keep approval, rejection or requests for further evidence attached to the order.
Do not allow a casual acknowledgement of the supplier’s message to stand in for a clear technical decision. If approval is limited to one batch, state that boundary.
Once a change is accepted through the proper process, update the documents used by inspection and receiving staff. Otherwise they may check against the old requirement while production follows the new one. The objective is a traceable decision, not simply a replacement name in a purchasing file.
Image: an editorial illustration, not a documentary photograph.