Impact estimation tables are not consistently used by Evo adopters. This may be due to their requiring more analysis and complexity than the priority problem often warrants. As mentioned, a less detailed 0 9 scale for benefit and costs ratios is an Evo alternative.
One-week evolutionary delivery iterations are difficult to sustain; two weeks is easier.
Gilb reports that a significant number of Evo adopters find quantification of their most critical objectives difficult without some coaching.
Evo's PDSA emphasis requires not only estimation and planning, but measuring. Yet, this last step is often dropped under the pressure of work, which of course makes Evo planning less useful.