McLaren believe it will take two races before they know if they hit their targets over the winter period.
The Woking team were one of the success stories from last season, rising from the lower reaches on the grid to eventually become chief challengers to runaway title winners Red Bull.
However, team principal Andrea Stella has urged caution for now and insists the team are not targeting finishing positions, only if the correct procedures are being undertaken to help the team progress.
"I won't talk about how we want to be second, first, third – because that's not even the language we use internally at McLaren. We don't talk about this," Stella told Autosport.
"Results take care of themselves. What we talk about is: 'What do we have to do in terms of aerodynamic development, mechanical development, how do we improve the interaction with the tyres'?
"We are making sure that every day, we feel we are making a little step forward. We are increasing competency, we are increasing expertise, we are increasing our knowledge in every parameter that ultimately will deliver performance on track.
"Then, once we are in Bahrain, once we are in Saudi, we will see how good a job we have done."