ISTQB CTAL-TTA case studies
ISTQB CTAL-TTA · Put your knowledge to work in context.
The ISTQB Certified Tester Advanced Level Technical Test Analyst (CTAL-TTA) is an advanced-level, vendor-neutral certification aimed at testers who work close to the code and the system internals rather than only at the requirements level. ISTQB describes it as providing "a thorough introduction to the technical testing skills which are fundamental in many organizations today," listing those skills as risk-based testing, white box testing, static and dynamic analysis, non-functional testing, and test automation. The ISTQB CTAL-TTA case studies are 5 cases and about 4,438 words.
1Resolving conflicting risk ratings on a claims intake replacement
Northbridge Mutual is replacing the intake module of its claims platform. A risk workshop with four business and three technical stakeholders produced a 5x5 matrix, but two entries are disputed.
870 words, about 4 min2Statement coverage at 100% while decision coverage stalls
CloudLedger's billing service contains the following method. The team's exit criterion is 100% statement coverage from the coverage tool; the current build reports 100% statement coverage and 68% decision coverage.
896 words, about 4 min3Triage of static analysis findings and misplaced dynamic analysis
Sentinel Drive's motor-control firmware is 250 kLOC of C. The team enabled a MISRA C:2012 checker in CI; the first run reported 1,412 violations, which the team believes are mostly advisory.
861 words, about 4 min4Reading load, stress and soak results for a booking API
Skyline Travel's booking API carries the requirement "search must respond quickly at peak". A load test with 500 virtual users reached 700 requests/second with a 95th percentile of 1.8 s and a 99th percentile of 4.2 s.
900 words, about 5 min5Rescuing an oversized, flaky UI automation suite
Vantage Insurance has 1,150 Selenium UI tests for its policy administration system. A full run takes 7.5 hours, 28% of the tests fail intermittently, and three engineers spend most of their week on maintenance.
911 words, about 5 min