Felipe Massa believes the sum of Williams' parts has produced a team that is better 'connected' under the new guidance of Paddy Lowe.
Lowe left Mercedes last winter to return to his former outfit, and the tech boss has brought together teams and departments at Grove in a more integrated way.
"I think to be honest what I saw in this team this year is completely different to what I saw in the last three years," Massa said on Thursday in Barcelona.
"In terms of the mentality for developing areas that we need to develop in. I see the team in a much more connected way of working together, in so many different areas, including aerodynamics.
"I believe we can have much better development during the season. The mentality, the working, is definitely completely different than what's happened in the last three years.
"I really believe that the working now is a lot more correct, intelligent, and a very good connection."
The Brazilian was quick to acknowledge Lowe's input and contribution.
"A lot - Paddy, [aero chief] Dirk de Beer, so many other people that were inside [the team] but something was missing.
"It was not really connected, and I think now people are trying to improve so many different areas that it was a problem.
"And definitely we're still at the beginning, so many things we need to do it, but the working is much different."
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