Nuclear power plant (NPP) outage represents a major operational cost that must be minimized to sustain competitiveness in the US energy market. However, outage management can be challenging because myriad of interdependent activities may need adjustment over the course of the outage. We conducted a site vist to the Advanced Test Reactor at the Idaho National Laboratory and a literature review to identify general directions for innovations in interactive visualization for outage management. First, new approaches are needed to represent task and scheduling uncertainty to better support estimates of effort and cost overruns as tasks change during outages. This would allow staff to project the likelihood of overruns and reallocate resources as appropriate. Second, outage support software should facilitate visualization of resource constraints whether hard (e.g., regulatory requirements) or ‘soft’ (i.e., those with cost, morale, or other consequences). When responding to emergent issues or unplanned work, the outage staff must be aware of all potential alternatives (e.g., overtime, additional staff, deferrable tasks) and the short- and longer-term implications of each choice. Third, there is currently limited understanding of how best to support outage staff’s ability to simulate the impact of potential schedule adjustments in response to new or reallocated work. Graphical “what if” scenario depictions should be an important component of future visualization capabilities. To realize the potential of AOCC, interactive visualization for outage management must better support situation awareness, decision-making and planning.