"Looking at the history of the survey, we've just come out of the longest consecutive period of contraction since 2009," she said.
On the plus side, an improvement in production and a sharp rise in the number of positive comments by manufacturers are welcome. However, new orders remain historically low, while those employed in manufacturing have been in decline for five consecutive months, she said.
BNZ senior economist Craig Ebert said the October result gave hope that the sector was stabilising after going through a rough patch in recent months.
He said the PMI result was "relief" but that headwinds for the manufacturing still prevail.
"The NZ dollar remains high, international demand is patchy, and the New Zealand economy is looking a bit bumpy and hesitant, including in employment," he said in a statement.
"Until we see a more concerted and consistent pulse in the PMI, we'll stay reticent about the sector's immediate growth prospects," he said.