In table 1 and 2 the data taken direct from the production line for shift A and shift B, the batch size is the amount of tons the company starts the production with, the amount of scrap is the amount of defective steel caused by breakdown or malfunction failure. The speed is taken for the period of operating. For example lets take shift A in day number 10 the batch size is 51 tons and the maximum speed of production is 1 ton per min, so the expected time to produce the batch is 51 min, but there is some amount of time waste for several reason and that time was 104 min, so the real time required to produce the 51 tons of steel in that day was 155 min and the speed was (51 tons/ 155 min = 0.3 tons/min). The shift time is 10 hour (600 min) in day number 10, the operation was only for 2.58 hours and the rest was off, this time (the rested time) is not considered in the study because they are not operating time and there is nothing about the maintenance.