jwielage wrote:Sorry if I'm stating the obvious, but one solution to the reliability issue would be to exclude contests where a particular driver has a mechanical related DNF. Each driver's respective percentages would then be calculated based on the number of races less their mechanical DNFs.
Clearly one of the keys to making this approach work is differentiating between "driver induced" DNF's and "pure mechanical" DNF's. For example, if a driver commits and error which results in a mechanical problem on the car, then the real cause of the failure is the driver's error. I'm not talking about when a driver shears their suspension off after making contact with a wall, but lets say they have a minor impact which damages the ERS system resulting in a cascading series of problems culminating in a retirement. These retirements might be hard to tease out.
Why do you want to distinguish between driver induced failures and pure mechanical failures? These statistics are in general not making that distinction, they are based on results which clearly depend on both car and driver performance both in terms of reliability and in terms of speed.
Considering how the drivers have become more professional with time, I expect that they generally make fewer mistakes than before, at least if we only consider the front runners. Of course, the cars and teams also help the drivers avoid mistakes to a greater extent than before, as the cars are easier to drive and so on, not to mention the tracks which now have run off areas instead of walls, gravel traps and grass.
It all depends on what you really want to study, but I think this information is very interesting without the distinction between driver error and mechanical failure as reson for DNF.