245_pdfsam_VLSI TEST PRINCIPLES & ARCHITECTURES

245_pdfsam_VLSI TEST PRINCIPLES & ARCHITECTURES -...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
214 VLSI Test Principles and Architectures fitness metric can mislead the GA to arrive at a suboptimal solution, or even no solution at all. For instance, a population whose individuals’ fitnesses are similar will not allow the selection process to identify more highly fit individuals to act as parents. Furthermore, without a metric, the individuals may become indistinguish- able even when they really are distinguishable. For example, if the fitness function is simply a binary function, where an individual’s fitness is equal to one if the target fault is excited and zero otherwise, this will result in many individuals with fitness equal to zero if they do not excite the target fault. It is clear, however, that some individuals may be closer to exciting the target fault than others. However, the aforementioned binary fitness function would prevent the GA from distinguishing those more fit individuals from the less fit ones. At the start of the ATPG process, there may exist many easy-to-detect faults;
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/16/2011 for the course ENGINEERIN mp108 taught by Professor Elbarki during the Spring '08 term at Alexandria University.

Ask a homework question - tutors are online