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N-version programing is defined as the independent generation of N2 2 functionally e quivalent prograns fran the sme initial specification. A methodology of N-version programing has been devised and three types of special mechanisms have been identified t hat are needed to coordinate the execution of an N-version software unit and to canpare the correspondent results generated by each version. Two experiments have been conducted to test the feasibility of N-version programing. The results o f these experiments are discussed. In addition, constraints are identified that must be met for effective application of N-version programing.
Chen et al. (Wed,) studied this question.
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