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<p>The authors present optimization models for software systems that are developed using a modular design technique. Four different software structures are considered: one program, no redundancy; one program, with redundancy; multiple programs, no redundancy; and multiple programs, with redundancy. The optimization problems are solved by using the authors' version of established optimization methods. The practical usefulness of this study is to draw the attention of software practitioners to an existing methodology that may be used to make an optimal selection out of an available pool of modules with known reliability and cost. All four models maximize software reliability while ensuring that expenditures remain within available resources. The software manager is allowed to select the appropriate model for a given situation.</p>
optimization models; modular software systems; modular design technique; redundancy; software practitioners; software reliability; dynamic programming; fault tolerance; integer programming; modularization; dynamic programming; fault tolerant computing; redundancy; software reliability

O. Berman and N. Ashrafi, "Optimization Models for Reliability of Modular Software Systems," in IEEE Transactions on Software Engineering, vol. 19, no. , pp. 1119-1123, 1993.
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