Goudie 
The failure of the Panther was mainly due to a very overstressed final drive (post WW2, the French operated the Panther and found it needed a final drive major overhaul after every 150km of use). This in turn was caused by industrial shortages forcing it to be built with lower strength steel in a less effective design. The two major problems were lack of high strength steel and lack of machine tools (the weak final drive had straight-cut gears as there was insufficient tooling to make the preferred helically-cut gears). The lack of machine tools was down to
area bombing, which deliberately targeted this capacity. They didn't try to hit the machines, the idea was simply to blow the roofs off and let the weather do the work.
Coupled with this was the German policy of maximising output at the expense of spares. So the Panther would arrive at the front by rail, advance 100 km and break down. With no spares, the technicians would have to rob the spares off another u/s Panther. Except, of course, this was probably u/s because of a broken final drive also.
43% of Panthers at the battle of Kursk went u/s through mechanical failure.
So, arguably the Germans
did produce enough tanks, but it was meeting this target at the expense of serviceability and spares which did them in.