CTAL-TTA practice question 19 of 25

You are working on a complex systems integration project that will soon be deployed to the production environment. This system is replacing a system…

Full set: 174 questions
You are working on a complex systems integration project that will soon be deployed to the production environment. This system is replacing a system that was popular with the users and had no outstanding non-functional issues. There are multiple components that interact and these have been developed by various development and testing groups including some outsourced groups. You will be leading the performance testing effort. Although you would prefer to have a dedicated test system for this effort, you will have to use the production system. You can do this testing at a low usage time, but there will be some users on the system and you will be using real data for the tests. You are now planning your performance testing. Unfortunately, there are no requirements for the performance requirements of the system. How do you determine the acceptable performance levels for the various operational profiles?
Answer options
A: You should check the performance of the legacy system and use that as a benchmark for the new system Correct answer
B: You should ask the users what they expect to see for the performance
C: You should go back to the business analysts and require them to update the requirements to include the performance expectations
D: You should use industry standard performance benchmarks
Correct Answer:
A. You should check the performance of the legacy system and use that as a benchmark for the new system
Explanation

Using the performance metrics from the legacy system as a benchmark provides a practical basis for establishing acceptable performance levels for the new system, especially when no defined requirements exist.

Why Incorrect

B. User expectations can be vague and may not reflect true performance requirements.
C. This may be impractical given the project timeline and likely lack of existing metrics.
D. Industry benchmarks might not directly apply to the specific context of the system being developed.

References

- ISTQB Certified Tester Advanced Level Test Analyst, 2019, pp. 115-116.

- IEEE Std 829-2008, IEEE Standard for Software and System Test Documentation, Section 4.

- Performance Testing Guidance for Web Applications, 2012, Chapter 2.

- The Art of Software Testing, Third Edition, John Wiley & Sons, p. 130.

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