Sauber boss Frédéric Vasseur says the Swiss outfit will measure its progress this year against Formula 1's front-runners rather than focus on its performance relative to its mid-field rivals.
Under Vasseur's management, and thanks in no small part to its close technical partnership with Ferrari, the Swiss outfit greatly improved last season, positioning itself as a regular top-ten contender in the second part of the year.
Sauber aims to sustain its progress in 2019, but Vasseur will be looking at the team's performance numbers relative to Mercedes, Ferrari and Red Bull rather than at the mid-field pecking order.
"We were more or less nowhere, so we had to improve in every single department and see," the Frenchman told Autosport.
"The reason for how we were getting on on-track was also due to the others – Williams struggling more than expected, McLaren.
"My trigger is more the gaps between the top teams, the percentage.
"[It is] the best way for me to monitor what we’re doing because they have big resources and if we are able to keep the same gap it means we’re improving.
"But we are closing the gap hugely compared to [2017]. Hugely."
As a reminder, the Hinwil squad's driver line-up for 2019 will include Ferrari junior Antonio Giovinazzi and 2007 F1 world champion Kimi Raikkonen.
Gallery: The beautiful wives and girlfriends of F1 drivers
Keep up to date with all the F1 news via Facebook and Twitter
Charles Leclerc believes Formula 1's new-era machinery has forced him to rethink one of the…
Formula 1's teams and drivers regroup this weekend surrounded by the majesty of the Ardennes…
Max Verstappen has once again refused to reveal his hand on his Formula 1 future,…
Aston Martin is facing a race against time at Spa-Francorchamps, with the team's ambitious push…
Red Bull has opted for caution over innovation ahead of this weekend’s Belgian Grand Prix…
Max Verstappen has made a significant move away from the Formula 1 cockpit by welcoming…