Mercedes F1 chief Toto Wolff is wary of making the right timed decision with regards to turning the world champion team's focus on the 2017 car, believing that getting started a week or two too late could have big repercussions on the state of readiness for next season.
A raft of new regulations are being rolled out for next season with an emphasis on prettier and faster cars, with aero being a key factor.
Wolf explained, "We are now entering a time where things are complicated even more by some big decisions to be made. "Every week we must analyse how much resource we move across to the 2017 project -- but that's a tricky balance."
"Some teams will have stopped 2016 development very early -- as early as February maybe, once the current cars hit the circuit. That does give them an advantage, as the learning curve is very steep at the beginning.
"If you are a few weeks behind you can find yourselves much further back in the end. We may be halfway through the battle for this year - but the hard work is only just beginning," added the Mercedes boss.