成本表/额外成本表与真实公关策略之间的关系是什么？

大家好：
我有一个关于成本表/额外成本表配置和真实PR策略的问题。
在我的项目中，LUT的使用率约为70 +％，并始终满足PR问题。
它报告：
警告：路由：464  - 路由器检测到非常密集，拥挤的设计。
路由器极不可能完成设计并满足您的时序要求...... blablablabla
我向同事或其他论坛寻求帮助，并被告知，不同的成本表/额外成本表映射了不同的PR策略。
在我更改配置后，是的，有时PR可以完成。
但每次，我只是盲目地循环所有组合，直到得到一个好的组合：10/11/12/13/14/15/20/21 /.../ 25/30 / ......有时我有
不幸的是，尝试超过50次测试。
那么有人可以给我一些建议：
1.成本表意味着什么？
- 我被告知它意味着随机种子的数量，或某些方程的参数，对吧？
2.额外费用表意味着什么？
- 它的范围从0到5，而5意味着最大的努力将用于PR？
3.一个固定的成本表设置＆amp;＆amp;
不同的额外成本表设置意味着“具有不同公关努力的固定公关策略”？
4.对于464号公路警告，我应该使用哪种方法？
是否有默认解决方案，或者我必须盲目地一遍又一遍地进行测试？
这个问题困扰了我很长一段时间，我真的很期待你的所有建议和帮助。
谢谢！



以下为原文

Hi all:
     I have a question about cost-table/extra-cost-table configuration and real PR strategy.
     In my project, the LUT usage is about 70+%, and always meet PR issues. It reports:

WARNING:Route:464 - The router has detected a very dense, congested design. It is extremely unlikely the router will be able to finish the design and meet your timing requirements...... blablablabla

     I asked help from colleagues or via other forums, and was told that, different cost-table/extra-cost-table maps different PR strategy. After I changed the configuration, yes, sometimes PR can finish.

    But everytime, I was just looping all the combinations blindly until got a good one: 10/11/12/13/14/15/20/21/.../25/30/......  Sometimes I had to try over 50 tests, unfortunatly. So could anyone please give me some advices that:
    1. cost-table means what? -- I was told it means the number of random seeds, or parameters of some equation, right?
    2. extra-cost-table means what? -- it ranges from 0 to 5, and 5 means the most effort will be used for PR?
    3. one fixed cost-table setting && different extra-cost-table setting means "a fixed PR strategy with different PR effort"?
    4. for the Route 464 warning, which stratery should I use? Is there a default solution, or I have to test over and over again blindly?

    This question bothers me quite a long time, and I am really expecting all your suggestions and help.

Thanks!