  The DUNE IDR describes the proposed physics program and technical designs of
the DUNE far detector modules in preparation for the full TDR to be published
in 2019. It is intended as an intermediate milestone on the path to a full TDR,
justifying the technical choices that flow down from the high-level physics
goals through requirements at all levels of the Project. These design choices
will enable the DUNE experiment to make the ground-breaking discoveries that
will help to answer fundamental physics questions. Volume 2 describes the
single-phase module's subsystems, the technical coordination required for its
design, construction, installation, and integration, and its organizational
structure.
