Product Documentation and Proposed Substitutions
Compare the requirement, not just the product name. Two descriptions can sound alike and still refer to different items. Before comparing a proposed product or alternative, build a clear record of what the project requires and who can approve a change.
Start with the controlling reference.
Record the drawing, specification, schedule or product reference that defines the item. Include its revision and date. Keep the item number consistent so the proposed product can be traced back to the request.
Separate three types of information.
Required.
Requirements that the project team has confirmed must be met. Identify their source rather than relying on an informal description.
Preferred.
Preferences that may be discussed, such as a requested brand or finish when the project documents allow a choice.
To be confirmed.
Missing or conflicting details. Keep them visible rather than treating an assumption as an approved selection.
Use a line-by-line comparison.
- Item reference and intended use stated by the project team
- Quantity, unit of measure and package quantity
- Dimensions and the way they are measured
- Specified material, grade, finish and color
- Required supporting documents
- Approved manufacturer or product restrictions, if applicable
- Proposed differences and the person responsible for approval
Treat an alternative as a question until reviewed.
Identify each difference between the requested and proposed item. Ask the responsible project professional what review is needed. Do not infer interchangeability from a similar name, appearance or price.
Name the required documents.
State the product data, certificates, test reports, drawings, marking or traceability required by your approved specification. Connect each requirement to an item number and indicate whether it is needed with the offer, before release or with the shipment. Keep general manufacturer literature separate from item-specific records. Document availability must be confirmed for the exact product and source. Retain the accepted product reference and revision with the material record.
Have a specification question?
Describe the item, reference the current documents and explain what remains unresolved. This guide organizes the conversation; it does not establish engineering suitability or approve substitutions.