Manual testing is the oldest and most rigorous type of software testing. Manual testing requires a tester to perform manual test operations on the test software without the help of Test automation. Manual testing is a laborious activity that requires the tester to possess a certain set of qualities; to be patient, observant, speculative, creative, innovative, open-minded, resourceful, unopinionated, and skillful.
Repetitive manual testing can be difficult to perform on large software applications or applications having very large dataset coverage. This drawback is compensated for by using manual black-box testing techniques including equivalence partitioning and boundary value analysis. The vast dataset specifications can be divided and converted into a more manageable and achievable set of test suites.
There is no complete substitute for manual testing. Manual testing is crucial for testing software applications more thoroughly. While automated testing definitely has a place in the testing process, it should never replace manual testing.