Figure 3.

The HTA process taxonomy includes four subsets and focuses on the key tasks performed by the HTA agency. Each group shows the relative positions of three key tasks, if performed, within the HTA agency: therapeutic value (TV), economic value (EV), and appraisal (AP). The four-subsets of the HTA Process taxonomy: H₁–the therapeutic value assessment, economic evaluation and appraisal are performed within the same agency. H₂–the therapeutic value assessment is conducted within the same agency as Economic evaluation but the appraisal is performed independently, usually by health professionals rather than civil servants. H₃–the therapeutic value is assessed prior to independent appraisal. H₄–the appraisal is conducted using information from an external HTA report or by considering the coverage decisions of reference countries.