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Man Hours

Automated tests will automatically run. Manual tests must be manually run. That’s ontological. If you only run a test one time, then automation has no return-on-investment. But if you run a test more than once, automation saves a tester from repeating themselves.

Coverage

Automated tests can achieve greater coverage than manual tests, particularly for regression testing. As product development progresses, the sheer number of test cases increases. For example, in Agile, new tests will be created every sprint. Older tests must be run periodically to verify that new features don’t break existing features.

Consistency

Automated scripts run the same way every time.

Protection

Continuous integration (CI) protects code against defects by building and testing every code change in real time. A CI system will automatically trigger tests all the time.

Delivery Time

Continuous delivery (CD) is the natural extension of continuous integration, in which software products can automatically be delivered (and potentially even deployed) as the final step in a CI pipeline.

Results and Metrics

Automation can also generate test reports,Automated tests simply yield more accurate and more comprehensive results.

Accountability

Inaccurate results may lead to poor business decisions. Automated results tell it like it is.

Creativity

While automated tests can cover the fixed, repetitive test scenarios, exploratory testing lets testers find creative ways to uncover defects and judge how well a product actually works. Lack of automation ties up human capital.

Quality

The ultimate purpose of test automation is product quality. Having automation doesn’t necessarily mean product quality is good, but not having automation severely limits how quality can be pursued.

Peace of Mind

Peace of mind is this which is required most, it shall help the team to focus on new challenges and implementation.