2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/191781We summarize the objectives and results of the ``international scoping study of a future neutrino factory and superbeam facility'' (ISS) physics working group. Furthermore, we discuss how the ISS study should develop into a neutrino factory design study (IDS-NF) from the point of view of physics and performance evaluation.3 pages, 1 figure. Plenary talk given at the NuFact 07 conferenceHigh Energy Physics - PhenomenologyHigh Energy Physics - Experimenttext