Figure 1: DARPA XAI Program Structure, including technical areas (TAs)
and evaluation framework
The original program schedule consisted of two phases: Phase 1,
Technology Demonstrations (18 months); and Phase 2, Comparative
Evaluations (30 months). During Phase 1, developers were asked to
demonstrate their technology against their own test problems. During
Phase 2, the original plan was to have developers test their technology
against one of two common problems (Figure 2) defined by the government
evaluator. At the end of Phase 2, the developers were expected to
contribute prototype software to an open source XAI toolkit.