The Defense Department won’t be able to make smart decisions about how much money it needs to produce a certain level of combat readiness until it begins collecting the right data in a scientific way, Center for Strategic and Budgetary Assessments senior fellow Todd Harrison said Tuesday. In discussing his new report, "Rethinking Readiness," Harrison told congressional staffers and others in his Capitol Hill presentation that the Pentagon has struggled to secure an adequate funding level for training and other…