Reliability evaluation using NHPP models

Many papers have been written on the theory of software reliability, and as many specific models described for evaluating it. Recent years have seen a trend toward a more global approach, though. The authors show how the non homogeneous Poisson process (NHPP) approach can be applied to the industrial world, The French space agency (CNES) has used this approach in studying one of its ground segment programs, and has concluded in favor of using different models for evaluating software in its qualification and operational phases. NHPP was also found to generate predictions that were accurate enough to justify using it in space application software.<>