PASTA: partial scan to enhance test compaction

We propose a procedure to select flip-flops for partial scan targeting the reduction of test length. We show that significant reductions in test length can be achieved by this procedure. In addition, experimental results show that using heuristics that target the test length does not have to increase the numbers of flip-flops that need to be scanned in order to achieve a given level of fault coverage. Consequently, it may be possible to perform partial scan selection targeting the two parameters, test length and fault coverage, without requiring more flip-flops than required for one of the parameters.