Two Dimensional Flexible Software Reliability Growth Model And Related Release Policy

The prospective disastrous failure of software and the consequential damage is a scenario that is of great concern in terms of scientific disaster preparedness. Proper vigilance for such an event to enable mitigation of adverse impacts to the greatest degree possible requires modeling of software reliability to capture the risk of software failure. Traditionally, one-dimensional models have been used to evaluate the reliability and quality of the software, but such models are limited in their ability to capture the combined effect of testing time and testing coverage in removing the fault content in the software. In this paper we develop a two dimensional software reliability growth model which consists of testing time and testing coverage. We further develop a cost model with two dimensional mean value function which minimizes the cost and finds the optimal testing time and testing coverage with a predetermined level of reliability. A numerical example for the optimization problem is given and model is validated on two data sets.