- If an enterprise has existing architecture descriptions, they should be used as the basis for the Baseline Description.
- The normal approach to Target Architecture development is top-down.
- In the Baseline Description, however, the analysis of the current state often has to be done bottom-up, particularly where little or no architecture assets exist.
- Whatever the approach, the goal should be to re-use existing material as much as possible, and to gather and analyze only that information that allows informed decisions to be made regarding the Target Business Architecture.