Variety: What keeps Viacom CEO Philippe Dauman awake at night? The thought of a teenage girl watching Nickelodeon on an iPad in her bedroom because that viewing is never captured by existing ratings measurement systems. That kind of “leakage” is one of the challenges that Viacom aims to solve with a host of new measurement metrics that it is offering to marketers. “We have reached an inflection point,” Dauman said.