Established streetwear brands do not wait until final inspection to think about quality. They plan QC before bulk production starts. The first step is confirming the approved sample, fabric quality, shrinkage, trims, artwork placement, size chart, packaging rules, and PP sample. Once these standards are locked, the factory can use them as a reference during cutting, sewing, decoration, washing, finishing, and packing. This helps prevent problems such as wrong measurements, color differences, poor stitching, misplaced logos, zipper issues, or inconsistent wash effects. For multi-season production, early QC planning is even more important because the same standard may need to be repeated across several drops or reorders.