Rubric
The set of criteria against which submitted projects are evaluated. The choice of rubric architecture — single-problem, explicit tracks, or abstracted uniform — determines what apples-to-apples comparison the event is even capable of making.
A rubric is the set of criteria against which submitted projects at a hackathon are evaluated, plus the weights and level descriptors that make those criteria operational. NASA Space Apps' five-criterion rubric (Impact, Creativity, Validity, Relevance, Presentation) is the canonical reference; the Google Solution Challenge's fifty-point rubric splitting Impact and Technology is the canonical example of a uniform rubric pitched one level above the problem domain. See fair-judging.
The choice of rubric architecture — single-problem, explicit tracks, or abstracted uniform — determines what apples-to-apples comparison the event is even capable of making. A single-equal-weight rubric applied across non-commensurate domains hides the cross-domain bias problem rather than solving it; a track-specific rubric solves it by refusing to make the comparison; an abstracted uniform rubric solves it by pitching the criteria one level above the problem domain and asking dimensions that hold across all participating projects. See track and cross-domain-bias.