Another motivation for FDI is customer mobility. When an important client of a company engages in FDI and starts a factory in a foreign market,the firm,either a parts supplier or service provider, may very likely follow its client and make FDI overseas so as not to lose the business to its competitors. The building of factories and warehouses by Japanese parts suppliers in the United States following the construction of auto assembly plants by major Japanese automakers in the country is an example of such kind of FDI. The introduction of JIT inventory management system increases the necessity of such investment, since the system is meant to minimize the inventory to increase efficiency, putting the suppliers at disadvantage to make supply from a distant foreign country.