Since unique items lack universal benchmarks, you must create a Product Specific Sheet (PSS). This document should define acceptable tolerance levels (e.g., ±1mm dimensions), color matching standards (Pantone), and functional stress tests. Implementing a During Production Inspection (DUPRO) is highly recommended to catch errors in the unique assembly process before the entire batch is completed. Focus on joint integrity, surface finishing, and packaging durability to ensure the item survives long-haul cross-border transit.