The second quadrant also focuses on testing aspects

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That support development, but from a business perspective. In this quadrant, functional testing is carried out to validate what is being built against user expectations. This involves both automated and manual testing.

The third quadrant is for testing that evaluates the product or service from a business perspective. This is the only quadrant where it is acceptable to only do manual testing and it is for exploration, usability, acceptance, and Alpha/Beta aspects (the latter is to determine which of more than one functionality option is best and is determined by the users themselves).

The last quadrant focuses on testing to evaluate the product from a technology tunisia phone number data perspective. Testing in this quadrant is carried out in a fully automated manner. Examples of testing are security and load.

Taking this one step forward, software quality assurance should not be a reactive activity. That is, instead of focusing on testing code to find defects or to verify that defects do not exist, we should instead carry out activities to prevent defects from existing.