A team uses MBT with a large state machine model for a flight booking system. A change is introduced to the fare calculation rules, affecting multiple states and transitions. The team has traceability links from requirements to model elements and from model elements to test cases. The project manager wants to minimize regression testing effort while ensuring adequate coverage. What is the most effective approach?

Update the model and generate a completely new test suite, discarding all existing test cases.

Re-run the entire test suite to ensure no regressions, as the change is complex and widespread.

Only run test cases that directly cover the changed fare calculation rules, ignoring other transitions.

Use traceability links to identify all model elements affected by the change, then regenerate test cases for those elements and run them along with a subset of existing test cases that cover related transitions.

A team uses MBT for a system with a model that includes a state machine for order processing. A change is made to the order cancellation process, affecting a specific state and its transitions. The team updates the model. What is the most appropriate regression testing approach?

Only run the newly generated test cases for the cancellation process.

Skip regression testing and rely on the new test cases generated from the updated model.

Re-run the entire test suite to ensure no regressions, as the change is in a critical process.

Re-run test cases that cover the cancellation process and related states, and generate new test cases for any new behavior.

After a change to the SUT, which test cases should be selected for regression testing?

Only test cases that failed in the last execution

Test cases affected by the change and those covering critical functionality

All test cases that were previously executed

Only newly generated test cases

A change in the SUT affects a state transition in the test model. What is the MOST likely ripple effect on the generated test cases?

No test cases will be affected because the model is abstract

Only the test execution results will be affected, not the test cases

Only test cases that exercise the changed transition will be affected

All test cases will need to be rewritten from scratch

A team uses MBT with a model that includes a state machine for an e-commerce checkout process. A change to the system adds a new payment method (e.g., digital wallet). The team performs a change impact analysis. Which of the following is the most appropriate next step?

Delete all existing test cases and generate a completely new test suite from scratch.

Update the test execution results to reflect the new payment method without changing the model.

Update the test model to include the new payment method, then regenerate test cases and identify which existing test cases are affected.

Re-run all existing test cases without modifying the model to ensure no regressions.

Certified Tester Model-Based Testing

Domain 4Objective 3

The Impact of Changes on the MBT Work Products CT-MBT Practice Questions (Page 4)

Part of the MBT Test Implementation and Execution domain, which makes up ~16% of our current practice bank. ISTQB does not publish an official question count, but from its 60-minute exam (~25–40 total, ~4–6 in this domain), expect 1–2 from this objective — we provide 21 practice questions to prepare you well beyond it. (estimate)

21questions here

5free pages

5concepts

Questions 16–20

16expert · hard
A team uses MBT with a large state machine model for a flight booking system. A change is introduced to the fare calculation rules, affecting multiple states and transitions. The team has traceability links from requirements to model elements and from model elements to test cases. The project manager wants to minimize regression testing effort while ensuring adequate coverage. What is the most effective approach?
Select an answer first
17application · medium
A team uses MBT for a system with a model that includes a state machine for order processing. A change is made to the order cancellation process, affecting a specific state and its transitions. The team updates the model. What is the most appropriate regression testing approach?
Select an answer first
18foundation · easy
After a change to the SUT, which test cases should be selected for regression testing?
Select an answer first
19foundation · easy
A change in the SUT affects a state transition in the test model. What is the MOST likely ripple effect on the generated test cases?
Select an answer first
20application · medium
A team uses MBT with a model that includes a state machine for an e-commerce checkout process. A change to the system adds a new payment method (e.g., digital wallet). The team performs a change impact analysis. Which of the following is the most appropriate next step?
Select an answer first

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