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Three Ways Graphical Models Are Used

publish date: 2026/06/08 03:53:19.222417 UTC

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There are three common ways in which graphical models are used in practice. Which of the following correctly describes all three? Select all that apply.

As a way of documenting an existing system — models must be correct but do not need to be complete

As a way to stimulate and focus discussion about an existing or proposed system — models may be incomplete and use notation informally

As a detailed system description for generating a system implementation — models must be both complete and correct

As a replacement for all written documentation in agile projects

As a substitute for stakeholder interviews during requirements elicitation

Correct Answer

(1) As a way to stimulate and focus discussion about an existing or proposed system — models may be incomplete and use notation informally

(2) As a way of documenting an existing system — models must be correct but do not need to be complete

(3) As a detailed system description for generating a system implementation — models must be both complete and correct

Explanation

The three ways are: (1) To stimulate discussion — models may be incomplete, used informally, as in agile modeling; (2) To document an existing system — models must be correct but need not be complete; (3) As a detailed description for code generation — models must be both complete and correct, requiring careful attention to notation (e.g., not confusing stick and block arrowheads).

Reference

Software Engineering, Ian Sommerville, 9th edition

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