[Laurent Rizzotti]

As the war progressed, the quality of German factory production was decreasing, as:

_ skilled workers were drafted and replaced by hastily trained women, forced workers from all Europe, prisoners of war or even concentration camp imnates (a good part of them ending there because they joined resistance movements in their countries), so loss of skill, motivation and even higher risk of sabotage.

_ factories were scattered into caves and so on. Production means were probably transferred before testing means.

_ despite all this, production was increased.

_ last, German pilot training was also worst than before. A trained driver will use better his car, and so have less mechanical problems, and I think it will be the same with an aircraft pilot.