Koczkodaj W W (1993). A new definition of consistency of pairwise comparisons. Mathematical and Computer Modelling 18(7): 79–84

slightly improved in:

Duszak Z and Koczkodaj W W (1994). Generalization of a new definition of consistency for pairwise comparisons.
Information Processing Letters 52(5): 273–276.

and independently analyzied in:

Boz´oki S and Rapcs´ak T (2008). On Saaty’s and Koczkodaj’s inconsistencies of pairwise comparison matrices.
Journal of Global Optimization 42(2): 157–175.

However,