The strategic bombing of German industry, transportation and cities, was gravely disappointing. Attacks on factories that made such seemingly crucial components as ball bearings, and even attacks on aircraft plants, were sadly useless. With plant and machinery relocation and more determined management, fighter aircraft production actually increased in early 1944 after major bombing. In the cities, the random cruelty and death inflicted from the sky had no appreciable effect on war production or the war.
Make sure you read that bolded bit again.