The Scottish side lost 62-13 at the Liberty Stadium on Sunday - conceding nine tries in the process - and Scott knows the performance wasn't good enough.
Head coach Alan Solomons has already called for his players to eliminate the errors from their game and Scott insists their lineout must improve.
And, with a match against Scarlets coming up on Friday, he hopes improvements are made sooner rather than later.
"On the back of the good work done, this past Sunday at Liberty Stadium was a huge disappointment," he told the Scotsman.
"Our lineout didn't function in the opening half which was frustrating, as we had good field position, and didn't allow us to put pressure on the Ospreys.
"We'll keep working on the things we're doing, without question.
"I think we're going in the right direction and the players believe in what we're trying to do.
"I can't highlight enough that you need a strong set piece to play from and attack from. My job is to produce that platform for the team to play from.
"Our set piece, in the form of our lineout, didn't function well. We'll be working hard on that this week and hope it will be the cornerstone of our performance against Scarlets on Friday."
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