ABSTRACT
Understanding the models and metrics that govern the number of unmanned vehicles (UVs) that a single human can manage will promote advances in both autonomy and interface design. This chapter reviews and extends literature on such models and metrics, organized around the conceptual notion of fan-out, defined as the number of UVs that a single human can manage. From the literature, there are two different types of fan-out models, which we refer to as pigeon-hole and scheduling models. The two types of model differ in who waits for whom; can the UV wait for the human to give it attention or must the human always be available to service the UV? Developing these models allows us to identify which technologies are most likely to help maximize mission effectiveness by maximizing fan-out. The most important technologies center on the notion of delegation, which influences autonomy, interface design, and team organization.
