production/sourcing of inputs to production/sourcing of iron and semis and subsequent production of finished steel products. The inputs include iron ore, coal, coke, power etc. The production of iron includes production of iron pellets, pig iron, sponge iron and production of semis include production of solid steel products such as slabs, billets and blooms. The finished steel products are manufactured in different rolling mills and classified broadly as flat and long steel products. The flat steel products are manufactured from slabs while long steel products are manufactured from billets and blooms. Flat steel products can be further segregated on the basis of the manufacturing stage of their production process as the finished product may be sold at each of these stages or be utilized for further processing in the next stage.