Maurizio Arrivabene has put Ferrari's recent downturn in performance to the lack of aerodynamic progress made with the car since the Spanish Grand Prix.
Ferrari heads into the summer break trailing Red Bull in the championship, ending a run as best of the rest behind Mercedes which stretched back to last year's opener in Australia. The team had high hopes of a title challenge coming into 2016 but is yet to win a race in 12 attempts.
Team boss Arrivabene says the team's progress on the engine side has not been replicated with the upgrades brought for its SF16-H chassis.
"In Canada we reacted quite well with the engine," Arrivabene said after watching Sebastian Vettel and Kimi Raikkonen finish fifth and sixth in Germany. "But if I look at the situation now and I go back, I think we don't have great improvements in terms of downforce since Barcelona. That is the problem.
"You have two types of downforce ... One is the aerodynamic downforce and the other is mechanical downforce. We have to work in both areas because they have to talk together because sometimes they talk different languages at the moment."
The summer break comes at a crucial time for Ferrari, with the team parting ways with technical chief James Allison on the eve of the German Grand Prix. Arrivabene says Ferrari will not "surrender" 2016 despite recent form.
"We are reorganising the team, without panicking because taking that decision means we are clear in mind what to do in terms of organisation. And moving forward for the rest of the season we know as well very clearly the areas where we have to improve.
"I have to say they [Red Bull] have improved quite well, it is in front of all of us, and that is something that was on our mind. But that doesn't mean we are going to surrender during this period. We have to think about and to react."