Within the more complete theory described here, the factor t F is a component part of the correction factor λ d [see, and note that λ d is denoted by λ D there]. There is no significant value in continuing the separate identification of t F. Probably, in the present state of knowledge, the best approximation for simple Fowler–Nordheim-type equation based modeling of CFE from metals is obtained by putting λ Z →1, P F → 1, ν ν F → v (f). This re-generates the Fowler–Nordheim-type equation used by Dyke and Dolan in 1956, and can be called the "simplified standard Fowler–Nordheim-type equation".