Exam OGEA-101 Topic 1 Question 162 Discussion

The chart illustrates an important TOGAF concept: ADM phases can operate concurrently or iteratively rather than strictly sequentially. The diagram shows Phase A activities occurring first, after which the architecture development phases (Business, Data, Application, and Technology Architectures) overlap in time. This overlap demonstrates how architecture development work may proceed in parallel as information becomes available, allowing architects to refine and coordinate the candidate architecture more efficiently.
TOGAF explicitly supports iteration and concurrency across ADM phases. While the phases are presented in a logical order, they are not intended to be executed in a rigid step-by-step sequence in all situations. Instead, architects may work across several phases simultaneously to address dependencies, refine requirements, and accelerate the development of the candidate architecture and roadmap.
Option A best reflects this principle because it acknowledges that phases may run together as part of an iterative architecture development process until a coherent candidate architecture is produced and validated.
Option B is incorrect because TOGAF does not mandate the use of specific project management tools such as Gantt charts. Option C is incorrect because the ADM is not strictly sequential. Option D is incorrect because the duration of phases is not fixed in TOGAF.
Therefore, the chart illustrates the concept that ADM phases may be executed concurrently to develop and validate the candidate architecture.