EA anamnesis An Approach for Decision Making Analysis in Enterprise Architecture

Enterprise Architecture (EA) modeling languages can express the business-to-IT-stack for an
organization, showing how changes in the IT landscape impact business aspects and vice versa.
Yet EA languages provide only the final architectural design, not the rationale behind this
design.
In earlier work, we presented the EA Anamnesis approach for EA rationalization. We discussed
how EA Anamnesis forms a complement to current EA modeling languages, showing for
example design alternatives, EA artifact selection criteria and the decision making strategy that
was used.
In this paper, we extend EA Anamnesis with a capability for organizational learning. In
particular, we present an integration of two viewpoints presented in earlier work: (1) an ex-ante
decision making viewpoint for rationalizing EA during decision making, which for example
captures a decision and its anticipated consequences, and (2) an ex-post decision making
viewpoint, which for example captures the unanticipated decision consequences, and possible
adjustments in criteria.
We use a fictitious, yet realistic, case study to illustrate our approach.