the BOM table takes mold products as the unit, namely, mold products recorded in the same BOM table are of the same serial No, and are distinguished by material No, in other words, in mold enterprise the product No.+ material No. is the sole mark for determining a mold part. In addition, the specification, dimension and stuff of the materials or rough part should be recorded. The stuff used for mold production are relatively stable, wherein those related with different national standards fall into over 30 types, such as S136, GS738, ASSAB718  and NAK-80 etc. when imputing the material information, the designer needs to decide the origin of the current materials, which is called the scheduled state.