How can IT groups claim they have an enterprise architecture (EA) — a single representation of the "truth" about their enterprise —if they do not consolidate knowledge into a single EA tool? Why is it so difficult for some enterprises to choose a single EA tool? This document describes the best practices for choosing an EA tool, using the results from the recent Forrester Wave™ of EA tools and its custom-weighting capability. The aim? To avoid the multiplication of EA tools . . . if politically possible.