Test Estimation Two approaches for the estimation of test effort: -Metrics-based approach Estimating the testing effort based on metrics of former or similar projects or based on typical values(top-down or bottom up via parametric models,rules of thumb,etc.) -Expert-based approach Estimating the tasks based on estimates made by the owner of the tasks or by experts(bottom- up via work-breakdown-structure) 同源大学 TONGJI UNIVERSITY SoftwareTesting 15/6/822Software Testing Test Estimation 15/6/8 22 • Two approaches for the estimation of test effort: – Metrics-based approach • Estimating the testing effort based on metrics of former or similar projects or based on typical values(top-down or bottom up via parametric models, rules of thumb, etc.) – Expert-based approach • Estimating the tasks based on estimates made by the owner of the tasks or by experts(bottom￾up via work-breakdown-structure)