We take a deep look at ten commonly used ways to test or estimate FTP, and dissect how and why each method does (or is supposed to) work, how often we might expect accurate result and who it'd be accurate for, and the Empirical Cycling standards for test accuracy. We also dig into some data on ramp test accuracy and bias, plus how anaerobic capacity, RPE, and daily fluctuations in performance can play a role in test results. Plus time in zone, %FTP, normalized power, lactate tests, the "Kolie Moore" test, and your listener questions on DFA-alpha1, eFTP, and more.