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Analysis and improvement of testability measure approximation algorithms

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4 Author(s)
Bitner, J. ; Comput. Eng. Res. Center, Texas Univ., Austin, TX, USA ; Jain, J. ; Abraham, J.A. ; Fussell, D.S.

This paper presents a theoretical framework for the study of algorithms for approximating testability measures. To illustrate its application, we consider two well-known algorithms. It is shown empirically that both algorithms perform very poorly on several circuits of realistic size. For some circuits, an equally good approximation to the testability measure can be achieved by a random number generator or a “0th order” approximation algorithm that always returns a constant 1/2. Analytically, we present several circuits for which the performance of these algorithms is arbitrarily bad. The analysis is then used to identify their weaknesses, and procedures are suggested through which such unpredictable performances may be improved. One procedure is discussed in detail and an order of magnitude improvement in accuracy results

Published in:

Test Symposium, 1994., Proceedings of the Third Asian

Date of Conference:

15-17 Nov 1994

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