At nearly 18% year on year, India's market for management consultancy services has been the fastest-growing of any big economy over recent years. According to an expert from The Business Research Company, this rapid growth is in part related to the country's vigorous offshoring industry, in which companies like Amazon, Google, Facebook and large banks carry out significant elements of their business processing in India to take advantage of its low cost base. These large Western companies either operate through subsidiaries or through Indian companies like Tata Consulting. In either case they encourage or require adaptation of their business processors' operations, finance and technology, leading the subsidiaries or suppliers to use management consultancy to help them adapt.