The Open Group OGA-031 Exam - Topic 1 Question 55 Discussion

Comprehensive and Detailed In-Depth

The black diamond notation in ArchiMate represents a Composition relationship, which is used to indicate whole-part relationships between elements.

Financial Processing is the whole (parent element).

X, Y, and Z are sub-functions, meaning they are part of Financial Processing.

Composition is a strong relationship, meaning the sub-functions (X, Y, and Z) do not exist independently outside Financial Processing.

Analysis of Answer Choices:

A. The financial processing function is composed of three sub-functions X, Y, and Z. Correct Answer

Composition relationships in ArchiMate indicate that one element is part of another in a strict, whole-part hierarchy.

ArchiMate 3.2 Specification, Section 6.4.2, defines Composition as a structural relationship where the child elements belong strictly to the parent.

Since Financial Processing contains X, Y, and Z as integral sub-functions, this is the correct choice.

B. The financial processing function aggregates the three sub-functions X, Y, and Z. Incorrect

Aggregation is a weaker relationship in ArchiMate compared to Composition.

In Aggregation, the sub-functions can exist independently, whereas in Composition, they cannot.

ArchiMate 3.2 Specification, Section 6.4.1, states that Aggregation does not enforce a strict whole-part relationship like Composition does.

C. The financial processing function is influenced by the three sub-functions X, Y, and Z. Incorrect

Influence relationships in ArchiMate do not represent whole-part structures.

Influence is a motivation relationship, meaning it represents an impact or effect, not a structural dependency.

D. The financial processing function is assigned the three sub-functions X, Y, and Z. Incorrect

Assignment relationships are used to indicate that a behavior element (e.g., function, process) is performed by an active structure element (e.g., role, actor, component).

This diagram does not depict an assignment relationship; instead, it shows a structural composition.

Final Answer: A. The financial processing function is composed of three sub-functions X, Y, and Z.

ArchiMate 3.2 Specification: Sections 6.4.2 (Composition), 6.4.1 (Aggregation), and 6.5 (Influence & Assignment).