Force India co-owner Vijay Mallya believes that his outfit will be able to target a top four finish in the Constructors' championship.
Force India has finished in sixth position on three occasions across recent years and currently holds sixth in the championship, narrowly behind rivals Lotus.
McLaren's troubled season has enabled the likes of Force India and Lotus to scrap for fifth place but Mallya reckons that his Silverstone-based squad can keep improving into 2016.
"We have under 400 people - and I am sure that I don’t have to double the workforce if I want to go further up the grid," Mallya told the official F1 website.
"That is what I honestly believe. Yes, I want to get better every year, but I also believe that doubling my work force is not the answer.
"If somebody tells me that to get to P4 I would have to go beyond 600 people, I very much disagree. We could also do it with our 380 people!
"I have set my targets for the team, and we are doing very well in achieving them. I will not get carried away saying that we will achieve P4 this season, but there is no reason why we should not target that in 2016."