The CIA Model is for use by the NHS to support economic appraisals in business cases. It replaces the Generic Economic Model (GEM).
The user guide shows how the CIA Model can be used to support economic appraisals in business cases. It provides guidance on the key economic principles, how these are used in economic appraisals and how the outcome of these appraisals is interpreted.
The CIA Model and guidance should be used for economic modelling for all investment business cases. It should be read in conjunction with the latest edition of The Green Book.
For IT only cases, please contact NHS Digital.