Taking one of the simplest parts, the metal frame, as a case in point, the supplier must report the amount of three or four kinds of materials used (such as stainless steel), the volume of zinc plating, and the waste products produced (gaseous, liquid, and solid).
以最單純元件「鐵框」為例，供應商需提供其使用的鋼材、不鏽鋼等 3 ~ 4 種原物料的「重量」，鍍鋅的「容量」，以及排出的廢棄物（含氣體、水、固態）數據。