On 15 December 2020, CGIAR Advisory Services (CAS) engaged with CGIAR System Council members in a deep dive drop-in session prior to the 11th meeting of System Council. The event presented three elevator-pitch style presentations followed by a moderated round table that discussed the One CGIAR Research and Innovation Strategy and the use of assessment, evaluation and impact studies in the One CGIAR new portfolio. Over 40 participants attended, comprising members of System Council, partners, SPIA and ISDC members and CAS Secretariat.