Williams head of vehicle performance Rob Smedley has called on the team to develop the car quickly ahead of the Spanish Grand Prix.

The Chinese Grand Prix last weekend was Smedley's second race working for the team, and saw Felipe Massa miss out on points due to a pit stop error while Valtteri Bottas finished in seventh place. Smedley said he would be looking to ensure Williams is working to progress where it needs to most urgently, especially with most teams looking to introduce major upgrades in Barcelona.

"Part of what I need to do is make sure that we're attacking the right areas first," Smedley said. "Because you could just run in and attack every single area that you see, but you just have to see where the big wins are.

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"That's the important and the clever bit about Formula One I think; you have to realise where the big wins are and what we can put off for a week or two, a month or two, even a year, and what we need to do in the next two days. That's part of what I'm here to do."

Asked by Crash.net what Williams needs to do between the Chinese and Spanish grands prix, Smedley replied: "We need more development on the car, that's no doubt.

"We were again in a reasonable position in the top ten [in China] - we probably would have been sixth with Felipe. The developments that we had - which was a really good team effort - have to my mind all clearly worked, but you're never going to see huge leaps in the grid. It's always incremental.

"So what do we need to do for Barcelona? We have to tidy up the operational bits which weren't good, we need to tidy up the reliability things that can stop us on the track and we just need to add more and more performance. Hopefully we have got - at least from what I'm used to - a reasonable step coming in all areas of the car, which is really, really interesting.

"I'm always loathed to say that's going to put us forward or whatever. It might just keep us where we are, but if that's what it does, that's what it's done and that's good; at least we're developing the car quick enough to keep up with everybody else."