Test is a key activity for ensuring software quality. There is always pressure from project sponsor and management for software development team to commit to shorter schedule and lower cost, especially for testing. Some of the main challenges in testing today are to match the test cases with requirements correctly, and to provide accurate estimates and track the test progress accordingly. In this paper, we present a parametric model for software test estimate along with a test graph for matching test cases with requirements and test cases analysis to aid in producing a more accurate estimates and tracking. The model and the test graph can be used jointly or individually.