The method I follow in steel calculation is as follows:

In the "Resource Name" section, I specify "Steel Works," then in the "Work" section, I enter the tonnage amount to be processed. Once I assign the number of days needed to complete the task in the "Duration" section, the "Resource Usage" section shows the daily distribution. Based on my daily processing capacity, I identify any excess and make manual adjustments. "Task Type= Fixed Work" should be selected.