Quality Attributes and Scenarios Flashcards

In iSAQB, which component of a quality scenario describes what triggers the quality-relevant event?

Answer: Stimulus source

The stimulus source identifies the actor or entity that initiates the stimulus in a quality scenario.

A system must handle 500 concurrent users with response time under 2 seconds at peak load. Which quality attribute does this PRIMARILY address?

Answer: Performance efficiency

Performance efficiency covers response time and resource usage under specified load conditions.

Which quality attribute is MOST concerned with how easily a system can be moved from one environment to another?

Answer: Portability

Portability (ISO 25010) addresses the ease of transferring a system to different hardware, software, or operational environments.

When two quality attributes conflict, what is the RECOMMENDED approach for an architect?

Answer: Make the conflict explicit and let stakeholders decide based on business priorities

Architects must surface trade-offs transparently so stakeholders can make informed prioritization decisions.

The 'response measure' part of a quality scenario defines:

Answer: The quantifiable criterion used to evaluate whether the system met the quality goal

The response measure provides a testable, quantitative or qualitative criterion for assessing the system's quality response.

Which quality attribute is PRIMARILY concerned with the ability of a system to prevent unauthorized access to data?

Answer: Security — confidentiality sub-characteristic

Confidentiality, a sub-characteristic of Security in ISO 25010, ensures data is accessible only to those authorized.

In a quality scenario for 'modifiability', a realistic stimulus would be:

Answer: A developer needs to add a new payment method to the checkout module

Modifiability scenarios are triggered by change requests, typically from developers, to alter system functionality.