Juventus brought in 10 new players last summer and three more in the January transfer window as they tried to banish memories of last season's disastrous seventh-placed finish.
But despite investing in a number of internationals, Juve have struggled to improve on their last campaign and sit seventh again with five games left.
Their chances of finishing in the top four remain remote as they trail fourth-placed Lazio by eight points.
But in the following off season, Juve will be concentrating on acquiring quality.
"When we arrived we found a cycle that was destined to come to its end," said Marotta, who took over as managing director last summer when Andrea Agnelli became the new president.
"Last summer we started a new cycle with great difficulty, starting from afresh. In the last few games we've used 14-16 players of whom 11-13 were new (this season).
"Now we want to keep improving this group while identifying two or three quality players who can benefit the team."
And Marotta insisted that doesn't mean the old guard will be ushered towards the exit, with the likes of Alessandro Del Piero and Gianluigi Buffon set to remain in Turin.
But the one element that remains uncertain is the future of coach Luigi Delneri beyond the end of this campaign.
"The club will come to its conclusions based on the work conducted by the coach during the season," said Marotta.
"We have a two-year deal with Delneri and we will meet with him and evaluate many things.
"The club is not standing still, we're evaluating and the subject of the coach will be dealt with at the right time."
However, if there was hope for Delneri it was in Marotta's admission that it is not possible to build a winning side overnight.
It is only Juve's fourth season back in Serie A since being relegated to Serie B following their part in the 2006 Calciopoli match-fixing scandal.
"The teams at the top of the league were built over a number of years," added Marotta.
"In football you can't expect from one moment to another to start winning, let alone winning everything."