A Study on Optimal Software Maintenance Policies with Warranty Period

Nam, Kyung-H.; Kim, Do-Hoon

Journal of Korean Society for Quality Management > Volume 39(2); 2011 > Article

Journal of Korean Society for Quality Management 2011;39(2): 170-.

보증기기간을 고려한 최적 소프트웨어의 보전정책 연구

남경현, 김도훈

경기대학교 응용정보통계학과

A Study on Optimal Software Maintenance Policies with Warranty Period

Kyung-H. Nam, Do-Hoon Kim

Department of Applied Information Statistics, Kyonggi University

ABSTRACT

In general, a software fault detection phenonenon is described by a software reliability model based on a nonhomogeneous Poisson process(NHPP). In this paper, we propose a software reliability growth model considering the differences of the software environments in both the testing phase and the operational phase. Also, we consider the problem of determining the optimal release time and the optimal warranty period that minimize the total expected software cost which takes account of periodic software maintenance(e.g. patch, update, etc). Finally, we analyze the sensitivity of the optimal release time and warranty period based on the fault data observed in the actual testing process.

Key Words: Nonhomogeneous Poisson Process;Software Reliability Growth Model;Mean Value Function;Software Release Time;Warranty Period;Total Expected Software Cost;