To achieve the best irrigation system, the ES can try several pipe planning schemes for each irrigation system, and select the best one as the final scheme, thus the optimization is accomplished.

• 另外，为获得最优的灌溉系统，本专家系统对每个灌溉系统均考虑了多种管道布置方案，可进行多种方案的优选，实现了优中选优。