What parameters should be confirmed for custom ceramic tableware?

Please verify the following points and require itemized written supplier responses:（ceramic tableware customization parameters） Custom ceramic tableware requires confirmation of material, color, shape, size, capacity, thickness, glaze, decoration, logo, decal process, packaging, lead time and acceptance criteria. Approve a sealed sample, clarify color tolerance and copyright, and avoid differences between mass production and samples. Define capacity, accuracy, materials and operating environment before requesting quotes on a uniform basis. Request specification sheets, test reports, certificates, maintenance manuals and spare-part lists. During acceptance, verify appearance, dimensions, functions, safety protection and packaging, and keep test records. Do not compare unit price alone; include customization, freight, spare parts, after-sales support and downtime risk. Keep written records of inquiries, confirmations, FAT, acceptance and warranty commitments.