By Morris Hua – VNO Technical Director
|Deliver goods only.||Deliver goods plus quality documents||1. Specified required quality documents in the PO.
2. Acceptance inspection with documents review at first.
|For customer, if quality document is no or not qualified, rejection will be issued directly no matter how good your parts are.|
|1.Never calibrate gauges till customer inform parts not qualified.
2.Gauge Calibration is too expensive and waste of time.
|All the gauge must be calibrated within a certain period or usage frequency.||Keep auditing gauge control procedure & evidence to ensure all involved gauges are within calibration valid time.||One time rejection can be worth many years’ calibration.|
|We can ensure you the material is the right material, no need to control the traceability, waste of time.||Full traceability required, each part can be traced back its unique melt number, Heat number, original mill material certificate, its purpose is for quarantines and recall efficiently.||1, Specify traceability requirements in the PO.
2. Traceability Procedure established by suppliers.
2. On site audit to ensure actions effectively in function.
|Recall all the batches or one traceable batch, many companies get huge loss for one failure of traceability.|
|No manufacture process or process as simple as possible. Quality ensured by skilled or experienced workers.||Good & detail manufacture process can ensure consistently produced parts no matter who the operator is if only he is qualified to a set standard.||1. Manufacture Process established when sample making.
2. Any change of the process must be approved from sample under revise process, sometimes by inner system, sometimes by customer.
|Process keep revising for competitive and consistence producing. Century enterprise is generated from this system.|
|Some part in upper limit, some part in lower limit, you cannot reject my parts within tolerance.||A tolerance specified is for supplier to choose a point for consistently producing. Sometimes a poor Cpk can also be lead to rejection.||1. Machining datum must be set up and maintained in strict tolerance to ensure followed dimension’s accuracy.
2. Tooling or cutter’s weariness must be put into consideration when design a machining process.
|Consistence requirement will improve the level of a supplier actually.|
NON DIMENSIONAL FEARTURES
|Dimensional features take high priority, note or remarks not important to put into consideration.||Remarks or Notes have the same even more importance than dimensional features, it is directly affect the function of the part.||1, All feature must be included in manufacture process especially non-dimensional features.
2. Inspection plan have the non-dimensional features in FAIR form.
|Currently 80% rejection due to non-dimensional features.|
|Randomly pick up gauges to inspect.||Consistent gauge should applied during inspection.||1. Gauge used for any features specified in FAIR form.
2. Special gauge like plug gauge, self made gauge be introduced in inspection to improve consistent inspection.
|Rejection happen very frequently due to the difference inspection method between customer & suppliers.|
|Sub-contract suppliers is not me, I cannot control it well, can you anodize or plate the part in your country?||Subcontract control is part of manufacture process, accountable by suppliers.||1. Subcontract work must have PO issued, including technique detail specified as a attachment.
2. Sub-contract should be applied to Qualified supplier list
|Sub-contract becomes a challenge and main issue during manufacture in past years in China.|
|Surface finish is not so important as functional features, we are not producing art work.||Parts must maintain its brand new status when acceptance inspection on customer’s site. Rejection will be happened if surface defects found.||1. Manufacture process must have surface control included such as inner transportation between processes.
2. Acceptance inspection have surface finish included.
|Good quality not only inner, outlook express also included.|
|Packaging is a minor thing compare with machining/plating.||Packaging must protect the quality status including surface finish during transportation.||1. Packaging plan must included in manufacture process.
2. Packaging must be inspected and approved before shipping.
|Perfect, High value goods become trash when arrived in customer.|