"The strong NZD is undoubtedly a major headache for many manufacturers" though manufacturing "globally is struggling".
The JPMorgan Global Manufacturing PMI shrank further to 48.1 in August, to reach the lowest in 28 months.
Today's manufacturing employment figures were the worst since July 2009 and confirmed the fears of workers in the sector of a jobs crisis, said a union for textiles and wood processing workers.
First Union general secretary Robert Reid said the survey overall reported a further contraction in manufacturing activity.
"Our union has been dealing with several significant cases of actual or proposed redundancies with employers, as have the EPMU and other unions.
"Goodman Fielder's announcement last week of a proposal to close around 18 of its 53 factories in Australia and New Zealand was the latest bad news for members of our union, which was announced without workforce consultation."
Reid said there was now a growing consensus around the need for monetary policy reform.
"Manufacturing is New Zealand's third largest employing industry. Hundreds of thousands of manufacturing workers deserve better a better response from the government that 'there's nothing we can do."