ASQ - Electronics and Communications Division

Improvements In Estimating Software Reliability From Growth Test Data

Abstract: © 2011 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must first be obtained from the IEEE.

This paper shows that by implementing Codier’s approach to line drawing for software reliability test data, that we can avoid deciding whether a log plot or a linear plot should be chosen. The recommended method avoids defining the optimistic and pessimistic extremes of the curves as linear, logarithmic or any other specific shape. It simply draws a line that follows the changing slope of the points naturally as originally proposed by Codier. This paper develops a methodology for calculating failure intensity from the slope of the resulting line and from the cumulative failure rate at the final data point. It avoids the optimism of the Basic law and the pessimism of the Logarithmic law as well as the decision of which to use.

Keywords: RAMS 2011 Proceedings - Product Reliability - Reliability Model - Software Reliability

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