2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44194In this talk I explain in brief the motivations behind undertaking a study of the LHC-ILC interplay. I will give information about the activities of the LHC-LC study group as well as the study group document. I will illustrate the scope of the document by taking a few examples from the document which has appeared on the archives \cite{Group:2004hn} since this talk was presented.13 pages, 5 figures, Plenary talk presented at the Intenational Conference on Linear Colliders, 19-23 April 2004, ParisHigh Energy Physics - Phenomenologytext