In order to describe the software testing process in detail, two non-homogeneous Poisson process (NHPP) SRGM incorporating fault coverage are proposed.

• 为了使软件可靠性增长模型能更好地刻画软件的测试过程，建立了两个基于故障覆盖率的非齐次泊松过程类软件可靠性增长模型。