Abstract
In this paper, an analysis of backtrack behavior in PODEM (the test generation algorithm for combinational circuits presented by P. Goel) is given. It is pointed out that there are still many unnecessary backtracks in PODEM on some occasions. A new test generation algorithm named IPODEM is therefore proposed in this paper. IPODEM is an improvement over PODEM with emphasis on backtrack of decision tree. A new backtrack approach is developed in this algorithm. It is shown that onlyO(j) of backtrack consumption is needed in IPODEM compared withO(2j) in PODEM on certain occasions. Experiments pointed out that these occasions appear in not small proportion. Several other techniques are applied in IPODEM to accelerate test generation process in other aspects. Experimental results demonstrated that IPODEM is faster than PODEM for both hard-testing and easy-testing single stuck fault, and that the former has higher test coverage than the latter.
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Wang, J., Wei, D. An effective test generation algorithm for combinational circuits. J. of Compt. Sci. & Technol. 1, 1–16 (1986). https://doi.org/10.1007/BF02943304
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DOI: https://doi.org/10.1007/BF02943304