In general, why is it NOT a good idea to estimate the testing effort based only on a percentage of development effort? Identify THREE valid reasons. 1 credit

In general, why is it NOT a good idea to estimate the testing effort based only on a percentage of development effort? Identify THREE valid reasons. 1 credit
A . The quality of the development estimate may be poor.
B . In general bottom-up estimation is always better than top-down estimation.
C . The percentage based technique only applies to the V life cycle model.
D . Using the same percentage every time does not address the level of risk of the application to be tested.
E . The maturity of the organization, e.g. the quality of the test basis, quality of development testing, configuration management, availability of test tools, also influence the effort needed for testing.
F . It builds on large set of historical data
G . The result is almost always a too low estimate for the required test effort

Answer: A,D,E

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