Effort estimate does not depend on the budget of the project, but rather on the scope, complexity, and quality of the software product and the testing activities1. Budget is a constraint that may affect the feasibility and accuracy of the effort estimate, but it is not a factor that determines the effort estimate. Effort estimate is the amount of work required to complete the testing activities, measured in terms of person-hours, person-days, or person-months2.
The other options are correct because:
A. Once the test effort is estimated, resources can be identified and a schedule can be drawn up, as they are interrelated aspects of the test planning process3. Resources are the people, tools, equipment, and facilities needed to perform the testing activities4. Schedule is the time frame and sequence of the testing activities, aligned with the project milestones and deadlines5.
B. Effort estimate can be inaccurate because the quality of the product under tests is not known, as it affects the number and severity of the defects that may be found and the rework that may be needed to fix them6. Quality is the degree to which the software product satisfies the specified requirements and meets the needs and expectations of the users and clients7.
D. Experience based estimation is one of the estimation techniques, which relies on the judgment and expertise of the testers and other project stakeholders to estimate the test effort based on similar projects or tasks done in the past. Experience based estimation can be useful when there is a lack of historical data, formal methods, or detailed information about the software product and the testing activities.
1 ISTQB® Certified Tester Foundation Level Syllabus v4.0, 2023, p. 154
2 ISTQB® Certified Tester Foundation Level Syllabus v4.0, 2023, p. 155
3 ISTQB® Certified Tester Foundation Level Syllabus v4.0, 2023, p. 156
4 ISTQB® Certified Tester Foundation Level Syllabus v4.0, 2023, p. 157
5 ISTQB® Certified Tester Foundation Level Syllabus v4.0, 2023, p. 158
6 ISTQB® Certified Tester Foundation Level Syllabus v4.0, 2023, p. 159
7 ISTQB® Certified Tester Foundation Level Syllabus v4.0, 2023, p. 16
[8] ISTQB® Certified Tester Foundation Level Syllabus v4.0, 2023, p. 160
[9] ISTQB® Certified Tester Foundation Level Syllabus v4.0, 2023, p. 161
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