Slide 5: Total cost (TC) versus total economic value (TEV)
A quick comparison of the net costs of options and their total economic value. The net cost of an option is determined from the estimated direct costs and the direct benefits of the option. These direct costs include cost of new land acquisition, translocation, and all of the various ex-situ conservation options. Total economic value, on the other hand, includes both use and non-use values of species resources (ideally including such intangibles as ecosystem operation and intrinsic species value - which are inevitably almost impossible to ascertain or price).