Choosing Manual Testing over Automation Testing

• When test cases need to be run for a short duration of time (once or twice). 


• When one needs to perform exploratory testing, usability testing, or ad-hoc testing.


• When assessing an application's user-friendliness.


• Whenever flexibility is needed. 


• Whenever one wants to better manage complex situations/scenarios.

Choosing Automation Testing over Manual Testing

• Whenever test cases have to be run repeatedly over a long period of time. 


• When one needs to perform performance testing, load testing, or regression testing. 


• Whenever one wishes to record the testing process.


• When one has a limited amount of time to complete the testing phase. 


• When tests are needed to be executed in a standard runtime environment. 


• When tests involve repetitive steps. 


• When there are multiple and quick deployments for the product, the manual becomes very time taking and redundant.