Entity Relationship Diagram

The document describes the steel making process and its entity relationship diagram. The major steps in steel making are: coke oven, blast furnace, LD converter, secondary refining, and casting. Raw materials like iron ore, coal, and limestone are transformed through these steps into finished steel products like slabs, bars, and coils. The entity relationship diagram shows the relationships between vendors, raw materials, finished steel, products, and customers in the steel making process.