During validation of a model for a medical device, the team discovers that the model allows a transition from 'Dispensing' to 'Idle' without completing the dispensing action. This is a safety-critical defect. The team must fix it and ensure it does not regress. What is the most appropriate action?

Add a guard condition to the transition and create a regression test that verifies the guard prevents the invalid transition.

Document the defect as a known limitation and proceed.

Remove the 'Dispensing' state from the model entirely.

Change the requirements to allow the transition.

What is the first step in handling a defect discovered in an MBT model during review?

Analyze the defect to understand its cause and impact

Ignore the defect if it is minor

Immediately delete the model and start over

Report the defect to the test team without fixing it

What does traceability in MBT models primarily enable?

Ensuring the model is executable

Linking model elements to requirements and design artifacts

Why is it important to maintain traceability between MBT models and requirements?

To make the model easier to read

To ensure that all requirements are covered by the model and to support impact analysis

To reduce the number of test cases generated

To eliminate the need for model validation

A modeling team uses a version-controlled repository for their MBT models. They want to encourage parallel development of independent model components while ensuring that changes are reviewed before integration. Which tooling workflow best supports this?

Developers email their model files to a lead who manually merges them offline.

Each developer works on a feature branch and submits a pull request for review before merging to the main branch.

The team uses a shared network drive and overwrites files as needed.

All developers commit directly to the main branch at the end of each day.

Certified Tester Model-Based Testing

Domain 2Objective 8

Iterative Model Development, Review and Validation CT-MBT Practice Questions (Page 3)

Part of the MBT Modeling domain, which makes up ~27% of our current practice bank. ISTQB does not publish an official question count, but from its 60-minute exam (~25–40 total, ~7–11 in this domain), expect 1–1 from this objective — we provide 27 practice questions to prepare you well beyond it. (estimate)

27questions here

6free pages

6concepts

Questions 11–15

11expert · hard
During validation of a model for a medical device, the team discovers that the model allows a transition from 'Dispensing' to 'Idle' without completing the dispensing action. This is a safety-critical defect. The team must fix it and ensure it does not regress. What is the most appropriate action?
Select an answer first
12foundation · easy
What is the first step in handling a defect discovered in an MBT model during review?
Select an answer first
13foundation · easy
What does traceability in MBT models primarily enable?
Select an answer first
14foundation · easy
Why is it important to maintain traceability between MBT models and requirements?
Select an answer first
15application · medium
A modeling team uses a version-controlled repository for their MBT models. They want to encourage parallel development of independent model components while ensuring that changes are reviewed before integration. Which tooling workflow best supports this?
Select an answer first

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