The Brackley-based marque made a promising start to the new Formula One season on Sunday, with Lewis Hamilton finishing fifth on his team debut after qualifying third in the Australian Grand Prix.
Unfortunately for Mercedes, team-mate Nico Rosberg retired with an electrical problem on lap 27, but the overall signs were positive.
Mercedes certainly appear to have taken a step forward from last year which if maintained could see them push Red Bull, Ferrari and Lotus for honours.
If that proves to be the case then Brawn, along with new motorsport director Toto Wolff, will face a tough decision as to how to divide resources between ongoing development this year and for next season's car when new, and highly-expensive, engine regulations come into force.
"Every team, regardless of who they are, has a finite resource in terms of people, facilities or funding," said Brawn.
"So inevitably you have to look at where you put those resources going forward.
"We've made a pretty early start on the 2014 car and that's being headed up by (technology director) Geoff Willis and been coming along quite nicely.
"Aldo Costa (engineering director), who has been responsible for this year's car, will move into that project later in the year.
"But we've a degree of flexibility when we do that as a lot depends on how this year goes.
"In many ways the ideal situation is we find it a difficult decision to make because we're having a good year and we don't want to compromise it.
"It is the challenge teams are facing, the challenge we anticipated and the reasons why we built the structure as we have."
Mercedes have been criticised for the number of top technical staff they currently employ as besides Brawn, Willis and Costa, there is also Bob Bell (technical director).
With Paddy Lowe, formerly McLaren's technical director before being placed on 'gardening leave' after his exit was confirmed earlier this year, due to join for the start of next season, that has only further confused matters.
Brawn, though, is determined to make Mercedes a success after three years with little to show for their efforts and multi-millions of pounds spent so far.
"Certainly at the moment there is this need to have two strong parallel programmes, so it will be a judgment call during the year on how we move the resource from one side to the other," added Brawn.
"Looking at last year we were weak in the second half and probably we took our eye off the ball of the car because we were focused on getting the wind tunnel upgraded, we restructured the aero group.
"We did a number of things, which do rather sound like excuses and I don't want to make excuses, but we're determined this year to keep the development of the car as strong as possible.
"If we do move resources later in the year then it will be in a controlled way and we decide it's the best way of dealing with this year and next year."