A refiner may choose a single blend spec for various grades of products. Here, quality is controlled by valves and RDOI control. A single product is chosen for a single period, then its recipe or volume is controlled according to the requirement. Operations are performed as per the stock availability and daily stock production prices. This topic will discuss a case for a single-period blend optimization and walk through all input data screens, optimization options, discussion points, a lab exercise using Ecopetrol blend data, component tanks, blend tanks, blend specs, production requirements, stock production rates, stock allocations, case blend models, recipe optimization using different options, etc.