A casting inspection plan states what will be checked, how it will be checked, how often and which result is acceptable. Build it around the finished drawing and service requirements before sample production.
Identify the characteristics that matter
Begin with features controlling fit, sealing, motion, load and appearance. Give each critical characteristic a drawing reference or identifier. Avoid a general instruction to inspect everything without defining the method, sample size or record required.
Use a clear planning structure
| Field | Example of information to specify |
|---|---|
| Characteristic | Bearing bore, sealing face, alloy composition or leak rate |
| Requirement | Drawing limit or referenced specification |
| Method | Agreed measurement or test procedure |
| Stage | Incoming material, first sample, after machining or final release |
| Frequency | First article, per lot or every part as agreed |
| Record | Report tied to part revision and lot or serial identification |
| Response | Containment and approval path for a nonconforming result |
Separate first samples from routine production
First-sample approval establishes whether the proposed route can deliver the agreed component. Routine inspection monitors the released process against selected requirements. Specify the reports and tests for each stage rather than assuming that the first-article package is repeated for every shipment.
Match the method to the question
Dimensional measurement checks geometry against the drawing. Material analysis supports alloy verification. Mechanical testing needs a defined specimen and condition. Internal-integrity inspection and leak testing require their own criteria. Choose the tests needed for the part and agree scope with the quotation.
Keep results traceable
Ask for part number, drawing revision, sample or lot identification, requirement, actual result and disposition in the report. Define who reviews the results and which approval releases production. When a drawing or process changes, decide which checks must be repeated.
Agree the response to a failed check
Define how affected parts are identified and held, who is informed and how a disposition is approved. Rework or a concession should not silently change the product requirement. Record the revised instruction or approval and verify the affected characteristics before release.
Questions for supplier qualification
- Which measurements are performed at the supplying site?
- What calibration and records are relevant to the project?
- Which tests or documents need separate quotation?
- How are drawing changes and inspection revisions connected?