What evidence can buyers request during a remote factory audit?

A copy of the ISO 9001:2015 certificate is the first threshold in a remote factory audit. Buyers should check three fields: the issuing body, the certification scope, and the expiration date. The issuing body must be a third-party certification body, not a self-printed document from the factory. The certification scope must cover CNC metal machining or related mechanical machining operations, not a generic "manufacturing" scope. The expiration date must still be valid on the day of the audit, and it is recommended to request proof of the most recent surveillance or recertification audit. The certificate number and the official verification link from the issuing body should also be requested so buyers can verify online themselves. As an ISO 9001:2015 certified manufacturer, Yuan Shun Li can provide a copy of the certificate for buyers to verify, but the specific certificate number and expiration date must be based on the actual issued document. It is recommended to request this from the contact person during the quotation stage.

First Article Inspection (FAI) reports and in-process measurement records are core evidence for assessing a CNC machining factory's process stability. Buyers should request FAI reports from the last three to five batches, which must include the measuring equipment name, inspector signature, actual measured values for critical dimensions with tolerance comparison, and disposition records for non-conforming items. In-process measurement records reflect the sampling frequency and abnormality feedback mechanism during machining. If the factory only has first article and pre-shipment inspections but lacks in-process sampling, this may indicate insufficient process control. For precision CNC turning, milling, or Swiss-type lathe machining, critical dimension measurement should not rely only on calipers; data from higher-precision instruments such as CMM or roundness testers should be provided. It is recommended that buyers request a complete FAI report sample, compare it with their own internal quality specifications, and then decide whether to proceed to the next stage.

The equipment list is an objective basis for assessing a CNC machining shop's actual production capacity and technical level. Buyers should ask suppliers to list the brand, model, number of axes, and quantity of their CNC lathes, milling machines, multi-tasking turn-mill machines, and Swiss-type sliding headstock lathes. Brand information is especially critical; for example, brands such as BROTHER and TAKISAWA represent a certain level of precision and stability. If Swiss-type sliding headstock lathes use brands like Star, it indicates the supplier has the capability to machine slender or small precision parts. The equipment list should also state the date of the most recent calibration and maintenance records to determine whether the machines are in usable condition. For requirements involving 3-axis to 5-axis milling and turn-mill machining, buyers need to specifically confirm whether the supplier has the corresponding machine types, rather than only a single type. Yuan Shun Li is equipped with BROTHER, Star Swiss-type sliding headstock lathes, and TAKISAWA equipment, supporting diverse machining needs from prototyping to mass production. The actual machine list and specifications are subject to the current conditions on the shop floor.

A live video walkthrough is an on-site verification that written documents cannot replace. Buyers should ask suppliers to conduct a real-time live broadcast using a mobile device, walking through the incoming material area, machining area, measurement area, and shipping/packaging area in sequence. In the incoming material area, check whether materials are stored in categories and clearly labeled. In the machining area, check machine maintenance status, cutting fluid management, and operational discipline. In the measurement area, check whether measuring instruments are within their calibration validity period and whether there is a dedicated quality assurance space. In the shipping/packaging area, check rust prevention packaging and anti-collision measures. During the video, buyers can ask the supplier to photograph specific machine nameplates, gauge calibration dates, or inspection records on the spot, and cross-check them with written documents. For CNC machining shops in the Tanzi District of Taichung, a video walkthrough also allows observation of the surrounding factory environment and the support capacity of the precision machinery industry cluster. It is recommended that buyers arrange at least 30 minutes for the video walkthrough, with quality assurance or procurement personnel participating simultaneously to ensure the depth of the inspection.

Document review and video inspection should be conducted in sequence to avoid wasting time for both buyers and suppliers. In the first stage, request the ISO 9001:2015 certificate, equipment list, and material traceability documents, and have the buyer's internal quality assurance or procurement team conduct a document review to filter out suppliers that clearly do not qualify. In the second stage, ask candidate suppliers to provide FAI reports and pre-shipment inspection report samples from the last three to five batches to assess their process stability and whether the report format meets your company's specifications. In the third stage, arrange a live video walkthrough with the quality assurance representative participating simultaneously to verify on-site consistency between the documented procedures and actual operations. For OEM parts supply, Tier-1 suppliers, or prototype development teams, these three stages of inspection can be completed without traveling, but if the order involves high-value materials or safety-critical parts, it is recommended to arrange one on-site factory visit as a final confirmation before mass production. Yuan Shun Li is located in Tanzi District, Taichung, near the precision machinery industry cluster, so the transportation cost for an on-site visit is relatively manageable.