Using a common risk taxonomy is the most important factor to consider when creating a separate IT risk register for a large organization with regard to the existing corporate risk register, as it ensures consistency, clarity, and alignment of the IT risk identification, classification, and reporting with the corporate risk management framework and strategy. Leveraging business risk professionals, relying on generic IT risk scenarios, and describing IT risk in business terms are not the most important factors, as they are more related to the resources, inputs, or outputs of the IT risk register, respectively, rather than the structure or format of the IT risk register. References = CRISC Review Manual, 7th Edition, page 100.