It deals with the flow of information or the flow of products and services. In short it is a relationship of operations and processes. One of the reasons for Tata Motors' success has been its excellent supply chain management. Their efficiency in quickly working with suppliers to estimate costs before their competitors is wonderful. In the case of Nano, they quickly estimated the price of the car with suppliers. First they determined the functional requirements of all parts of the Nano without even letting the public know their intentions. Tata Motors uses Ariba Spend Management as its SCM, which is a state-of-the-art costing software. Helped Tata Motors reduce costs by helping it find new suppliers, rationalize its supply base and meet deadlines