Butland is pushing to be England's No1 for the World Cup.
"There is an element from the goalkeeping side where you've got to know where things stand," he says.
"I think it would give some kind of clarity and I don't think it would affect the group if people know earlier.
"That is down to the manager whether he makes that decision in March or at the end of the season. Whether it's public or not, I think it would potentially be important for someone to know.
"I don't think there will be changes during the World Cup unless there are injuries. I'm sure he will nail down who the No 1 is and give that person the right amount of time to prepare for what's ahead."