Mike Coughlan is adamant Williams need to constantly upgrade their FW35 if they want to deliver on their potential.
Last season Williams claimed pole position and the victory at Barcelona, proving that their car had pace. However, for the most part the team failed to turn that pace into points.
This season, the Grove-based team is determined to avoid repeating those mistakes.
"We didn't deliver on our potential last year," Coughlan, Williams' tech director, told Autosport.
"Pastor's driving towards the end of the season was tremendous; people didn't realise the problems he was carrying in the car.
"Every race [in 2013] we'll have something.
"We're trying to do it in a methodical, engineering-biased way, so obviously your aim is always to make sure you are system checking at the factory such that you are able to take developments straight to the circuit.
"When you have got a new car, you aim for the last couple of days in Barcelona to run in Melbourne specification.
"We will then be in Melbourne with a step forward, which you will see at every other race.
"Malaysia is difficult, but we will take an upgrade to every single circuit."