有些设计,尽管尺寸和复杂性似乎相似,布线时间却可能从几分钟到数天不等.怎样确定在给定规则下PCB能否布通?到底需要多少层?线宽是否太粗?布局是否要进一步改进?对自动布线的期望是否太高?能否在给定足够时间内达到100%自动布通?许多PCB设计者都面对同样的问题.尽管经验可以帮助我们得到答案,但是,如果答案错了,必须要花费许多时间重新进行设计.因此,正确回答上述问题对于控制和管理开发成本和时间便至关重要. Some designs, while similar in size and complexity, may take anywhere from a few minutes to several days to route.How to Determine Whether a PCB Can Be Printed Under a Given Rule? How Many Layers Are Required? Is the Linewidth Too Thick? Is the Layout Want to improve further? Expectation of automatic cabling is too high? Can it reach 100% of robots in a given enough time? Many PCB designers face the same problem. Although experience can help us to get answers, if The answer is wrong and you have to spend a lot of time redesigning it, so answering these questions correctly is crucial to controlling and managing development costs and time.