Western Australia's Police Minister has insisted the state is "moving in the right direction" in crime prevention amid rising rates of criminal offences and renewed criticism of her performance.

Key points: Labor claims new report shows WA's crime spend is yielding poor results

Labor claims new report shows WA's crime spend is yielding poor results Police Minister Liza Harvey concedes some statistics are not great, but says they are improving

Police Minister Liza Harvey concedes some statistics are not great, but says they are improving Mrs Harvey hoping to keep police portfolio in imminent Cabinet reshuffle

Liza Harvey has faced repeated attacks from the Opposition over statistics that have repeatedly shown a significant increase in monthly offending rates compared to the 12 months prior.

Mrs Harvey today brushed off the latest attack, which was based on a national report that Labor said indicated WA compared unfavourably to other states in getting the best value from its crime spend.

The Minister said while the rates of many crimes were unacceptably high, they were still better than when Labor was in power.

"Have a look at where we have come over 10 years. We are moving in the right direction and none of these things happen overnight," Mrs Harvey said.

"I am not saying we have got it all right ... but I cannot and will not stand by and say we are moving in the wrong direction because the trend is significantly down and the satisfaction rate with police is moving up.

"I am pleased with that, while acknowledging there is still a lot more to do."

Labor has repeatedly criticised WA Police's new operating model Frontline 2020, saying the fact crime rates increased after its implementation was something the Minister needed to be held to account over.

"The fact of the matter is they have had seven years to improve the situation for community safety in this state and they have failed," Labor's police spokeswoman Michelle Roberts said.

"People in Western Australia feel less safe in their homes."

Premier Colin Barnett is set to undertake an imminent Cabinet reshuffle, with Health Minister Kim Hames to leave the ministry ahead of his retirement.

Mrs Harvey said she would "love" to keep the police portfolio.

"Ultimately it will be the Premier's call but I would hope to keep the police portfolio because I have a lot of initiatives in play and I would like to see some of those come to fruition," she said.

Mrs Harvey is firming as favourite to take over as Deputy Premier when Dr Hames steps down from the role in less than a fortnight, but she said she was not getting ahead of herself.

"I am not aware of anyone else who is running but anything can happen in a day in politics, let alone a week," she said.