四川省每年有上百万立方米木材统一调配到各地、市及外省。根据现有交通运输网,怎样制定调运方案使总的运输费用最小,是供销双方都十分关心的问题。以往,由于管理手段跟不上,一直是按宜水则水、远近搭配的原则制定调运方案。这样制定的方案不可能是最优,不可避免地会造成人力、物力、财力的浪费,随着电子计算机的飞速 Every year, more than one million cubic meters of timber are distributed to all over Sichuan, Sichuan and other provinces. According to the existing transport network, how to formulate a transport plan to minimize the total transport costs is a matter of great concern to both the supply and marketing sides. In the past, due to the management methods can not keep up, has always been based on the water should be water, with the principle of distance adjustment plan. This scheme can not be formulated optimal, will inevitably result in human, material and financial waste, as the computer’s rapid