Since 2014 when Williams became Mercedes powered much has been expected of the Grove based team and right now they are third in the Formula 1 pecking order behind Mercedes and Ferrari, with deputy team principal Claire Williams believing that they need to improve their chassis to ruffle the top two.
"We have a great power unit in Mercedes and we're very fortunate that we made that decision to jump from the Renault [in 2013] and take the Mercedes power unit," she said at the Autosport Show.
"But it's as much about the chassis as it is the power unit and the Mercedes guys have done a fantastic job on their chassis, they have a great power unit and therefore they're dominating. We need to do a better job on our chassis in order to take the fight to them," she admitted.
In 2013 the team the team were expecting much, but things did not go according to plan, "We got to Australia and thought the car was pretty good in 2013."
"But we were very misguided in testing and when we all saw quite how bad the car was we did literally get a clean sheet of paper and wrote down: what do we need to do?"
"It wasn't really rocket science either. The people we had in engineering needed bolstering, restructuring, we needed to choose a new engine, did we need to look at our driver line-up?"
"Hardest piece of the puzzle is now in that: how do we close the gap to the Ferraris and Mercedes and fight for a championship?"
"Really turning around [when things go] so badly you've obviously got so many things wrong in your organisation and you know what they are, you've got to change them.
"This is the hardest piece of work for us now moving forwards," predicted Williams whose team have not won a grand prix since 2012 when Pastor Madlonado triumphed in Spain.