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We present several extensions of the effect?cause analysis method [1] for fault diagnosis in combinational circuits. First, we extend the analysis to circuits consisting of interconnected modules that are assumed to be internal fault-free. To handle the situation in which the obtained response is incompatible with a fault domain restricted to the I/O pins of modules, we introduce a hierarchical approach that repeats the analysis, every time with a suspected module replaced by its gate model, while the rest of the circuit remains modeled at the module level.
single and multiple stuck-at faults, Combinational circuits, effect?cause analysis, fault diagnosis, hierarchical approach, module-level circuits, path-oriented approach

M. Abramovici, "A Hierarchical, Path-Oriented Approach to Fault Diagnosis in Modular Combinational Circuits," in IEEE Transactions on Computers, vol. 31, no. , pp. 672-677, 1982.
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