When procuring a sugar mill plant, the primary metric is the Crushing Capacity (TCD - Tons of Cane per Day), which typically ranges from 500 TCD for mini-plants to over 10,000 TCD for industrial scales. You must evaluate the Extraction Efficiency, aiming for a sucrose extraction rate of 95% or higher. Key components like heavy-duty rollers, diffusers, and multi-effect evaporators should be made of corrosion-resistant stainless steel (Grade 304 or 316) to withstand the acidic nature of cane juice. Additionally, ensure the plant includes a cogeneration system to utilize bagasse for steam and electricity production, enhancing operational self-sufficiency.