Production leveling by volume has been applied, for several years, at the Electric arc furnace, caster and hot strip
mill because those plants are working 24X7 except during planned maintenance or troubles. However, production
leveling by mix was not applied and the large batch philosophy was dominant. This led to large batches of the same
product route and huge quantities waiting for processing at different stages and uneven production load at the
downstream processes. Figure 2 describes the traditional planning which produces large quantities of pickled
products, skin passed products, and slitting products in the first, second and third day respectively. This will lead to
two or three days of waiting time at each of those plants.