What does it mean when an ABB from the Target Architecture cannot be found in the Baseline Architecture?

When an Architecture Building Block (ABB) from the Target Architecture cannot be found in the Baseline Architecture, it signifies that there is a disparity between the two architectures. This situation is indicative of a gap that exists because the Target Architecture includes elements or components that have not yet been represented or implemented in the Baseline Architecture.

Documenting this as a gap emphasizes the need for action—specifically, the necessity to bridge this gap to ensure that the Baseline Architecture aligns with the goals and requirements laid out in the Target Architecture. Identifying and recognizing such gaps is crucial in enterprise architecture as it helps in planning the transition from the current state (Baseline) toward the desired future state (Target).

The other choices don’t adequately capture the nuance of this situation. For instance, marking it as a non-conformance issue might suggest a compliance matter rather than a developmental gap. Claiming that the Target Architecture is outdated doesn’t consider that it may represent the desired future state, regardless of its current implementation status. Lastly, stating that it must be included in the next review cycle does not directly address the action required to fill the identified gap effectively.