VEVEY, SWITZERLAND — Nestle S.A. has announced the opening of a factory in western Turkey that has an annual production capacity of 15,000 tonnes of breakfast cereal. Cereal Partners Worldwide, a joint venture between Nestle and General Mills, Inc., owns the facility and will operate it. About 85 million Turkish Lira ($45 million) was invested in the construction of the plant. Located in Turkey’s Karacabey region, it will produce breakfast cereal for the Turkish market as well as for 14 other countries in the Middle East and Africa.