Read this https://www.immigration.govt.nz/opsmanual/#66788.htm
Seems a job offer must be at least 30hrs average per week over the term of the offer.
EOI submitted Jan 2010. ITA Jan 2010. ITA submitted Apr 2010. RV approved June 2011. Passports stickered and back to us Aug 2011. Secured job Dec 2011. Arrived Mar 2012. PRV Mar 2014......now eligible for citizenship but at $1175 Yeah but Nah!!!