利用关联函数，提出了在竞争条件下目标市场的确定方法．并借助于可拓关系对目标市场策略的赢得进行了描述，讨论了策略赢得可拓的实现手段，及策略赢得的可拓域

Using the incidence function, we present a method about determination of targeting in competitive condition. The tactical win is described with the concept of the extension relationship, the method of extension about the tactical win and the extension field of the tactical win are discussed in this paper.