Refining & Petrochemicals business have peculiar and complex supply chain. Volatility in oil & product prices, changing demand patterns for fuels, chemicals and other products, stringent environmental regulations and non-linearity of process operations need to be embedded into the system, neccesitating very sophisticated tools to manage supply chain planning. Linear programming based applications have become handy planning tools to select feedstock, optimize product mix, and determine optimal operating conditions over the desired time-frame.