Everton manager David Moyes believes QPR may have to wait to see the benefit of bringing in Mark Hughes but he is backing Saturday's opponents to survive their first season back in the Barclays Premier League.
Since Hughes replaced Neil Warnock in early January the Loftus Road club have taken just four points from six league matches.
The 17th-placed side are only out of the relegation zone on goal difference.
Moyes said not every new manager could have an instant impact and Rs fans would have to be patient.
"When a new manager comes in you can sometimes get the instant effect of winning a few games like Martin O'Neill (at Sunderland)," he said. "But in other situations it takes time to get results and bed in what you are trying to do.
"But there is no right way and wrong way because if that was the case chairman would be changing managers every three months just to get an instant hit."