ZUFEK
Use one identified production drawing
Include drawing number, revision and units in the RFQ and purchase documentation. Mark superseded files clearly within the agreed document process. A descriptive filename alone may not establish which issue was approved if several attachments circulate between engineering and purchasing.
Document changes and deviations separately
A permanent design change and a temporary accepted deviation are different decisions. Record the affected feature, quantity or lot and approval scope. Do not allow a sample concession to silently become the specification for every future order.
Connect records to the correct revision
Inspection reports, approved samples and packaging references should identify the applicable drawing. If a change affects the manufacturing or inspection route, review those documents too. Updating the drawing while retaining an obsolete inspection reference can leave the production team working to inconsistent requirements.
Confirm the specification on reordering
For a repeat purchase, state whether the previous drawing, finish and acceptance plan still apply. Identify any changes to mating parts or assembly conditions. A nominally unchanged screw can need review when the customer changes the component around it.
Specification example
A buyer reordering a part can include one line stating the approved drawing revision and inspection-plan issue. That is more reliable than asking for the same as last time when several sample versions exist.
RFQ checklist
- Drawing number and revision
- Permanent versus temporary changes
- Linked sample and report references
- Affected process documents
- Repeat-order confirmation
Use the RFQ preparation checklist, then submit your drawing for review. For acceptance requirements, see quality planning.
General guidance only. Material properties, tolerances, standards and manufacturing feasibility must be verified for the actual specification. This article does not establish a product performance guarantee.