豹式戰車
The process of streamlining the production of German armoured fighting vehicles first began after Speer became a "Reichminister" in early 1942, and steadily accelerated through to 1944; the production of the Panther tank coincided with this period of increased manufacturing-efficiency. At the beginning of the war, German armoured fighting vehicle manufacturers had employed labour-intensive and costly manufacturing methods unsuitable for the needs of mass production; even with streamlined production methods, Germany never approached the efficiency of Allied manufacturing during World War II.