"We are responding to our audience appetite for shorter and sharper stories while continuing with our investigative approach," she said in a statement.
The move follows major changes to both TV One and TV3's current affairs offerings. TVNZ's Sunday programme was the first to switch to a half-hour format in 2012, ahead of 3D on TV3 earlier this year.
Last week, MediaWorks confirmed 3D would not return next year, claiming Kiwi audiences were moving away from long-form current affairs.
Earlier this year, Native Affairs hit headlines after Forbes and producer Annabelle Lee quit the programme, just months after presenter Julian Wilcox resigned.
At the time, Roderick said Native Affairs was "poised to trail blaze a new era in New Zealand journalism".