GOAL-line cameras will be installed at the MCG and Etihad Stadium from as early as round 12 as part of a trial to improve the score-review system, AFL football operations manager Mark Evans says.

Evans told AFL.com.au's Footy Feed earlier this week he was "delighted" with how the score-review system was working in 2014, but said goal-line cameras could improve it.

Once installed, the goal-line cameras will be used at every game at the two Melbourne venues for the rest of the 2014 season.

Evans said the trial would tell the AFL precisely how much goal-line cameras improved the score-review system, suggesting that this would help determine whether the League installed them at other venues.

"We need a solution that's robust, that doesn't drop out. It's not easy venue to venue," Evans said.

"But I'm happy to tell you that in three or four weeks time the two venues in Melbourne will come online and we can genuinely test to see whether there's benefit in that system.

"Funding is always an issue, but what we have to do is prove to the world that the funding that we're spending is efficient.

"It's complicated and it will end up being a complete refit of cabling and routers at the MCG and Etihad and we'll put in some cameras on the posts for all games for the rest of the year, from about round 12 onwards.

"That will tell us what benefit we get."

Evans said in 11 of almost 40 score reviews conducted this season the AFL felt it had not had enough information to make a decision.

But eight of those 11 reviews would have been assisted by goal-line cameras, Evans said.

"But the question is how far do you go?" he said.

"We will always have some things in our game that won't be captured, but the question for me is when we get to the end of this year we'll be better informed than we are now."