He expects to find out how police handle family and sexual violence in other centres, and bring new ideas back to Whanganui.
He's been chosen for the job because Whanganui was an early adopter of Whangaia Ngā Pā Harakeke, an initiative in which police partner with local iwi and communities to reduce family harm.
There have been many aspects to this, Allan said.
In a separate but related initiative, Ash Patea and others have been growing police knowledge of te ao Māori and Whanganui history.
"It's been compelling, for some. It's awesome," Allan said.
The 30 extra staff across Whanganui/Ruapehu since 2017 have also given police more time to spend with whānau, establishing trust and understanding.
What they are doing is not a new programme or service, Allan said. It could be just following up on a violent episode and strengthening connections with those involved.
Previously police had been attending violent incidents, without the ability to build
connections.
There's been a recognition by police and the wider community that change will only happen when police have the time, space and capacity to make those person-to-person connections, Allan said.
In late 2018 a large group of stakeholders mulled over what would help the Whanganui situation.
Partnering with Tūpoho, Whanganui Police set up FLOW - a "long and deep story" in itself, Allan said.
The FLOW team is 13 police, with Peter Porter and Varnia Allan as kaihautū (leaders). It's based in a former education department building in Victoria Ave - because it's about more than police and the police station.
Families/whānau are now going to FLOW when they are under stress and before there is a violent crisis. They get consultation and support, and can decide what else to do.
"We are not counsellors," Allan said.
"It's not for the police or anyone to tell families what they need."
He's quite certain these changes are making a difference, but unwilling to use the number of episodes to prove that.
Nationally the rate at which family harm is reported is low, he said, and police can expect more to be reported as families gain more trust in police.
Police service delivery is growing, and there's more that can be done.
"There's still a massive opportunity to keep building," he said.