Sporting director Moody will lead the search for new additions in January but claims that manager Tony Pulis is not looking to bring in many players as the club looks to secure their Premier League status.
"I don't think there will be 15 or 16 players coming in during January - that would have a destabilising effect," Moody told the South London Press.
"It is about fine-tuning, identifying the two or three players you need to try and upgrade.
"A lot is dictated by the philosophy of a club. I always ask what is the perception? I've always known Palace as having razor-sharp wide guys and two guys holding. An athletic and quick team."
Moody joined Palace in November following his departure from Cardiff City.