It is necessary to set out the set of scenarios that financial entitiesas defined in Article 2, points (a) to (t) referred to in Title II of this Regulation should take into account both for the implementation of ICT response and recovery plans and for the testing of ICT business continuity plans. Those scenarios should serve as a starting point for financial entitiesas defined in Article 2, points (a) to (t) to analyse both the relevance and plausibility of each scenario and the need to develop alternative scenarios. Financial entitiesas defined in Article 2, points (a) to (t) should focus on those scenarios in which investment in resilience measures could be more efficient and effective. By testing switchovers between the primary ICT infrastructure and any redundant capacity, backups and redundant facilities, financial institutions should assess whether that capacity, backup, and those facilities operate effectively for a sufficient period of time and ensure that the normal functioning of the primary ICT infrastructure is restored in accordance with the recovery objectives.