Swiss food giant Nestle SA said Thursday it is seeking increased productivity at its Swiss factories to combat the surging value of the Swiss franc.

"We must think of productivity increases in Switzerland. It is all about productivity," Nestle Chief Executive Paul Bulcke said at the opening of a CHF200 million production unit at Konolfingen in central Switzerland.

The company said it remains committed to Switzerland despite the strong franc which is making the situation tough for the world's largest food maker. Nestle exports two thirds of its production from the country.

Nestle Chief Executive Paul Bulcke said the Swiss franc must be brought into line with the euro and the dollar.

"The euro and dollar are too weak, but that's beyond our influence," Bulcke said. The Swiss franc is not helpful for Nestle Switzerland."