Completeness is the holy grail of TMF metrics....we have been searching for it for a very long time but have still not found it yet! We struggle to understand not only what we have in our TMF but also and more importantly what we actually need to be able to tell a complete and accurate story of the study. We spend countless hours trying to compile this metric, only to find out come an inspection, that we are still missing key pieces of information needed for the inspector to understand what happened... In this session we will discuss why it is so challenging to establish accurate completeness metrics and approaches that we could take to improve accuracy and efficiency when evaluating the completeness of our TMF.