在二十世纪末期又出现了软运筹学。
At the end of twentieth century , there appeared soft operations research .
运筹学的研究要“返朴归真”，20世纪80年代后软运筹学的建立，使得运筹学更好地适应现实世界。
The software operations research which was founded from the80s in the20th century makes itself adapt to the society .
软运筹学