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Fault (in)dependent cost estimates and conflict-directed backtracking to guide sequential circuit test generation

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3 Author(s)
Konijnenburg, M. ; Philips Res. Lab., Eindhoven, Netherlands ; van der Linden, H. ; van de Goor, A.

The search for tests for sequential circuits (STPG) by deterministic test pattern generation is a process of alternately performing mandatory assignments and heuristic decisions on signal lines. We have observed problems in the decision-making process due to shortcomings in the SCOAP controllability/observability metrics and the backtrack process during STPG. In this paper we propose new techniques to improve the controllability/observability metrics, and two forms of conflict-directed backtracking (back-jumping) to improve the backtrack process. Experimental results demonstrate that the proposed techniques are very promising and result in a significant improvement in fault efficiencies and CPU usage for the ISCAS'89 and industrial circuits

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Test Symposium, 1999. (ATS '99) Proceedings. Eighth Asian

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