Robson feels a decision will be delayed on whether Powell is farmed out on loan with several clubs rumoured to be interested.
"I just think sometimes you don't make a decision on that until you get through pre-season and see how the lads performed in the matches," explained Robson. "Then make a decision. Is it good for the player if he's not going to get in the first team straight away or is it best that he goes out on loan for maybe two or three months?
"Or you could wait until the January window and allow him to go out in six months and assess again whether you bring him back or whether he should stay out on loan. I think, with the younger players, you've got to assess it as it goes along rather than make a decision at this stage of the season."
Robson utilised the loan market to good effect himself when in charge at West Brom, with the temporary capture of Kieran Richardson from United in 2005 going a long way to ensuring the Baggies staved off relegation from the Barclays Premier League.
"Kieran was a major part and that just shows you the impact of it," he added. "He was so good and it shows what an important part it got to play in the season because, without Kieran, I don't think we probably would have stayed up. He had that much of an influence on us."