Lack of search for an optimum solution—a "good enough" solution is enough because: As far as is known, there is no analytical method for finding an absolute optimum (i.e., having the overall shortest critical chain).
这意味着一个“足够好”的解决方法已经足够了，因为： 就目前所知，没有任何分析方法能找到一个绝对的最佳的（比如，总体的最短关键链）。