Câu 5: CTEL-ITP-ATP: Certified Tester Expert Level Assessing Test Processes

As a test manager, you are asked to apply causal analysis techniques to identify why a regression test that passed during system testing, failed during production usage. This caused significant business reputational damage, so you want to ensure that you get to the true cause of the issue. You interview the test engineer that created the test and executed it. The test object was a complex overnight batch. The batch processed a significant amount of financial market data and calculated financial risk. As you discuss the details with the test engineer, it appears that they ran the test during working hours, rather than overnight. You also discover that the batch processed live financial data, rather than specially-crafted test data. You asked why live data was used and the test analyst explains that this was approved as the data is public. They also explain that the expected result is that the result matches the live system, because otherwise the expected result is too difficult to calculate. You ask a business analyst to help identify the cause. They investigate and determine that the issue could only be reproduced during a particular time window, when a particular data boundary was crossed. You want to draw a fishbone analysis of this. From left to right, which is the MOST correct diagram to draw:

1. A. Time of day not identified as a test condition - test executed during working day - incorrect test result - failure in production.
2. B. Test design did not cover equivalence partitions - poor test coverage - failure in production.
3. C. Failure in production - poor test coverage - test design did not cover boundary values.
4. D. Failure in production - incorrect test result - test executed during working day - time of day not identified as a test condition. — đáp án hiện tại