Test compaction by test cube merging for four-way bridging faults
Irith Pomeranz · 2015
Test compaction that accommodates the constraints of test data compression can be achieved by generating test cubes for target faults, and then merging the test cubes. This paper describes an improved test cube merging procedure for four-way bridging faults. The procedure is motivated by the prevalence of bridging defects and the fact that test sets for bridging faults are larger than test sets for single stuck-at faults. A four-way bridging fault gi/ai/himodels the case where a value aiof a line hidominates the value of a line gi. A basic test cube merging procedure considers a set of test cubes Cdetthat detects target faults. The paper extends the set of test cubes to include, in addition to Cdet, a set of test cubes Cdomthat assign values to dominating lines. Test cubes from Cdomhave significantly fewer specified values than test cubes from Cdet. When test cubes from Cdomare merged with test cubes from Cdet, each resulting test cube detects more faults, and fewer test cubes are needed for detecting the same set of target faults.