Rob Smedley is adamant that beliefs in the paddock that Williams struggle to develop their cars is nothing but a myth.
Last Sunday in Spain, several of Williams rivals went into the race armed with massive upgrades especially Ferrari.
Williams in contrast only had a few and, while not able to challenge Sebastian Vettel, were at least able to keep Kimi Raikkonen behind Valtteri Bottas.
And Smedley says that's a clear sign that Williams understand what is needed to develop the car.
"There is a myth that has been circulating the paddock for about the last 18 months that Williams is not able to develop the car," the Williams Head of Vehicle Performance told Autosport.
"But I think that we have again proved the upgrades we have brought here, even though we didn't make a fanfare about it, have been good.
"We have got quite a lot more coming in the pipeline as well, including some development items in Monaco.
"It's a constant rate of upgrades and some are really healthy so it is a definite reason to be positive."
The Brit, who joined Williams from Ferrari at the start of the 2014 season, believes the Grove can looking ahead to a bright future.
"I'm very happy with how the team is operating," he added.
"I'm more comfortable than I've been since I joined the team.
"We've put together a very competent group now who operate very well and that's only getting better.
"It's quite a young group, in terms of experience so it hasn't fully matured in terms of how it is working together.
"If you look at the Red Bull group, they have been the same for a long time. The potential I see is good so I'm happy."