Williams chief operations engineer Mark Gillan said the team had been given a boost in confidence by its pace in Singapore, even though it failed to secure a finish in F1's annual night race.
Pastor Maldonado qualified in second place before he was forced to retire from the race while Bruno Senna also dropped out of a points scoring position when a KERS issue forced him into retirement.
While that meant the team failed to score for the third time in the last five races, Gillan said there were plus points to be taken from the weekend given the pace shown in both qualifying and on race day.
“It gives us a tremendous amount of confidence,” he said. “We saw that the car was capable of qualifying on the front row and that the race pace was equally impressive. Both drivers did a very good job in the race, with Pastor fighting hard at the front and Bruno carving his way from the back into a points scoring position before having to retire the car.
“[However] in brief it was an extremely frustrating weekend. It was what I would call a character building weekend, with the high expectations following a front row qualification and fast race pace ultimately dashed due to a double DNF and a risky strategy call.”
Gillan added that the team was working to understand the reasons why both Maldonado and Senna had been forced to retire, while also looking into what had caused Senna to sustain burns to his back during the race,
“The car has been very reliable,” he said. “We are currently investigating the failures and have full confidence in getting to the root cause quickly and implementing the required fixes as soon as possible. At this stage we do not believe that the heat played a part in the failures.
“We have a good idea [what caused Senna's burns] but are still investigating just to make sure that we have covered all potential causes.”