| The dissertation investigates and proposes techniques to reduce test application time and time to market test requirements. Test generation techniques for logic and delay faults in digital circuits are presented.;For logic defects, concurrent test generation in multi-core System on Chip to reduce test application time is proposed. The Single Stuck-at Fault model is considered.;For timing defects, a compaction technique based on implicit path removal is proposed. The Path Delay Fault model is considered. Also, a test generation technique for sequential (non-scan) circuits proposed. |