When selecting a factory, prioritize those with advanced garment construction technology, such as computerized pattern making (CAD) and automated cutting systems. Ensure the facility specializes in the specific niche you require, whether it be high-street streetwear, luxury evening wear, or performance sportswear. A top-tier factory should demonstrate stitching precision (SPI - Stitches Per Inch) that matches original benchmarks and possess specialized machinery for complex details like embroidery, heat-pressing, or laser cutting.