Pastor Maldonado has highlighted consistency as one of the key areas Williams must improve this year while his team-mate Valtteri Bottas is ready for his rookie campaign.
Williams became the last team to launch their 2013 challenger in Barcelona on Tuesday and the team are determined to improve further this year after they took major strides forward last year.
Maldonado, who claimed his maiden win and Williams' first P1 in eight years at the Spanish Grand Prix last year, has set his sights on being more competitive this year.
"Starting my third season with Williams is important for both myself and the team," the Venezuelan said.
"We've been working hard to develop the car and improve our performance. Last year we won a race and were competitive, but this season we must be even more competitive which I believe is possible.
"Consistency will be our aim to close the gap to the teams in front. There are a number of changes this season, I have a new race engineer and a new team-mate in Valtteri, but there is a nice atmosphere right now as we are all competitive and know each other well.
"Being part of the Williams family is very special as a driver and I want to thank Frank for not only giving me the opportunity to drive for him, but also to deliver a win. My goal is to help take the team back to the top."
While Maldonado will no doubt be hoping for another race win in 2013, his team-mate Bottas has a different challenge as he will be making his debut this year.
The Finn enters Formula One with a big reputation and he is already looking forward to the opening race of the season in Australia.
"It feels great to now be promoted to race driver with Williams this season. It's a big step and I'm really looking forward to it," he said.
"I have been doing a lot of training, meeting with my engineers and working in the simulator in preparation; so I feel ready. We know we have improved our car from last season but I am looking forward to seeing how it compares on track.
"We have a busy test programme ahead but I'm really excited. The moment the start lights go out in Melbourne is a moment I have been building towards my whole career."