Quality Planning & Inspection

Quality planning starts before production

A useful quality plan identifies what matters on the drawing, how it will be verified, when the control takes place and which records must accompany the order. Tianluping reviews material requirements, critical dimensions, datums, visible surfaces, functional characteristics, sampling and documentation before the manufacturing route is released.

Material and specification control

State the complete material grade or alloy, governing standard, edition and required condition. Spectrometer verification and material records can be included according to the agreed project plan.

Dimensional and visual requirements

Separate cast dimensions from machined dimensions and identify function-critical characteristics. CMM, gauges, projection measurement, visual inspection and roughness measurement are selected according to the feature and tolerance.

Inspection and testing capabilities

Available inspection and test resources include an Oxford spectrograph, coordinate measurement, gauges and projection measurement, X-ray, penetrant testing, microscopy, surface-roughness measurement, tensile testing, salt-spray testing and air-tightness testing. The applicable method, acceptance criteria and sampling level must be defined for the project.

Non-destructive and functional checks

X-ray, penetrant testing, microscopy and air-tightness testing are not applied automatically to every component. They are selected where part function, risk, drawing notes or purchase requirements justify them.

Measurement records

Material reports, full-dimensional reports, first article inspection, PPAP and traceability records can be included when agreed before quotation and production.

Process control and release

Incoming checks, in-process inspection, first-piece verification, final inspection, nonconformance control, corrective action and packaging review form a controlled route from receipt of requirements to shipment.

Nonconformance and corrective action

When a requirement is not met, the response should identify containment, cause, corrective action and verification. An 8D format can be used when required by the customer or project.

Packaging and traceability

Packaging, labels, lot identification and traceability requirements should be stated before release because they can affect handling, inspection records and delivery preparation.

What to define in the RFQ

• Material grade, standard and required condition
• Critical dimensions, datums and acceptance limits
• Visible surfaces, finish and cosmetic criteria
• Functional, pressure or corrosion-related requirements
• Inspection method, sampling and required reports
• FAI, PPAP, traceability, packaging and labeling requirements

Capability figures and available equipment do not replace a project-specific inspection plan. Final methods, sampling and records are confirmed against the drawing and order requirements.