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The increasing complexity of system-on-a-chip and ASIC designs has caused an ever-widening gap between what can be designed and what can be. It is estimated that between 50-70% of the time required to design a complex IC is spent in verifying that the functionality of the system is correct. Bugs in a design are least expensive to fix just after they are created. At this stage the design is still fresh in the designer's mind and other parts of the project or other design team members are unaffected. Bugs are at least an order of magnitude more expensive to fix during system integration. In this phase it takes more time and people to analyse the cause, regression tests must be rerun, and the entire group may be delayed. These challenges are giving rise to some exciting new tools and approaches in Verification techniques.
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