This relationship was probably first quantified in 1936 at Wright-Patterson Air Force Base in the United States, where it was determined that every time total aircraft production doubled, the required labour time decreased by 10 to 15 percent.
这个关系最初在1936年在美国怀特·帕特森空军基地被量化：每當飛機生產數目加倍，所需的劳动时间就減少10－15%。