Exam CBAP topic 1 question 300 discussion

• Necessity: when it only makes sense to implement a particular requirement if a related requirement is also implemented. BABOK Page-82

I go w B

In a user privilege and access control system, “Create a role” and “Find a role” have a necessity relationship because the ability to find a role is necessary to perform certain actions related to roles, such as modifying or assigning them. If a user cannot find an existing role, managing roles effectively becomes impossible. This type of relationship indicates that one use case (“Find a role”) is required or essential for the other use case (“Create a role”) to function correctly in the system’s overall workflow.

Based on V3, the correct relationship between "Create a role" and "Find a role" when there is a high level of formality would be: Option B: Derive This is because the "Find a role" requirement is derived from the "Create a role" requirement. In a formal context, the ability to find a role typically depends on roles being created first. Therefore, "Find a role" is derived from the prerequisite action of "Create a role." pg81: Derive: relationship between two requirements, used when a requirement is derived from another requirement. This type of relationship is appropriate to link the requirements on different levels of abstraction. For example, a solution requirement derived from a business or a stakeholder requirement.

C - Necessity "Find a role" is needed only if "Create a role" is implemented

"Find role" use case depends on "Create role". If the role doesn't exists, then it's impossible to find it. It's clearly not a derived relationship. Necessity is a depending relationship, so yes, answer C is correct

Necessity

derive

its correct in both direction, create a role is a necessity for finding a role and finding a role can lead to a role creation ( if it is not available)