why Design Planning?

Design planning is essential for following reasons:
1.Major design problems can be targeted well ahead in time.
2.You can come into a conclusion that whether the design would be viable or not.
3.In larger chips hierarchical designs timing closure is becoming difficult due to the long inter block path delay,might lead to unpredictable tape out schedule.
4.More time may be consumed in the design process.


The two useful strategies in design planning are:
1.Floor planning
2. Power planning