We carry out quality inspections at four stages: 1. Incoming Quality Control (IQC): Inspect raw materials and components before they enter production. 2. In-Process Quality Control (IPQC): Conduct routine inspections during production and assembly. 3. Final Quality Inspection: Inspect each completed machine before packaging. 4. Outgoing Quality Control (OQC): Perform a final inspection before shipment to verify that the equipment meets order requirements.