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Why?
A minor change in a design may alter user behaviour in ways that are hard to detect in a usability test. An A/B test allows you to compare real-world user behaviour across different versions of a product.
Why?
Test a subsystem or component in isolation to ensure its correctness before integrating it with other components or modules.
Why?
Computer simulations are used when a real-world process, system or event situation is not available or feasible.
Why?
Gain insights by measuring and analysing data. Researching a dataset can give you useful quantitative information about the topic of interest.
Why?
Ensure that the data you are using is of sufficient quality to base further conclusions on.
Why?
Hardware does not always perform according to its specifications. Hardware validation ensures that the hardware performs as expected and excludes hardware as a source of errors.
Why?
Verify the correctness and usefulness of the results of your model with the stakeholders or compare different models with respect to their usefulness.
Why?
Ensure that your model produces results of sufficient quality to base your conclusions on.
Why?
Test the operating conditions under which the system delivers its intended functions.
Why?
Understand the security risks of an IT system.
Why?
Solve problems before your system goes into production and demonstrate that the system operates according to its requirements.
Why?
Find certain types of bugs as early as possible and ensure your code keeps running after a change.
Why?
Detect problems users have with your solution and correct them before the system goes live.
