The team announced a reshuffle of its management on Wednesday, which included the resignation of racing director Eric Boullier - triggered by McLaren's disappointing season. We didn't get here overnight and we're not going to fix this overnight.
"In the last 11 days we [have] raced three times, so the performance and the power shouldn't be too different to what we saw in the last couple of weeks", he predicted. We're going to have good and bad weekends ahead but we're not going to quit.
"What we've announced is not a finished product, it's a starting point.' Brown admitted that this year's McLaren has 'less downforce" than last year's vehicle which carried the team to ninth-place out of 10 in the final standings.
McLaren announced the resignation of racing director Eric Boullier on Wednesday and the appointment of former Indianapolis 500 victor Gil de Ferran in a newly created role at the struggling Formula One team.
He said: "I've got really good communications with everyone in the team and so I have been working with Eric in the previous year and a half".
When suggested that he was at the head of the charge, Alonso stated, "No, I don't think so".
'We need to simplify to speed up the decision-making process and my job is to put that pace into the organisation, get the right leadership in place and get on with getting back to where McLaren should be.
When asked by Formula1.com if McLaren were facing a wait similar to that of Mercedes and Red Bull to fight for the title, Brown said: "Yeah, realistically".
Brown concedes that the remaining part of the season - 12 races in total - will be challenging, but fourth in the constructors' championship remains a goal. But definitely, I have more experience than probably all the engineers at the track.
'What we're going to do is fight like mad to finish fourth in [this year's] championship standings'.
McLaren team boss Eric Boullierresigned from his post on Thursday and leaves a question mark surrounding team structure and Fernando Alonso's future.
"Obviously I had more experience with Andrea than Zak, who has only known Andrea for one year long".
"We're ultimately working towards developing a faster racing team and a faster racing vehicle, so I would not look at what we've announced as a finished product".