Levelling means levelling the shell from the tilted position to vertical position i.e., at 0 degree Leveling delay- It might take time to reach the angle as sometimes the angle might not be formed at once and the shell might deviate from the required angle Hopper- Basic delay i.e., the time taken is greater than the SOP. We can visualize shell as a bottle where, to tap out the metal, we have to rotate shell at an angle, after which EBT Jam Removal occurs following which EBT mass filling occurs. The above 3 activities are sequential and occur in all the cycles. Only After all the three above activities have been completed, we go for top pouring or launder pouring, which are separate processes that are also sequential.