Stimulus: A new tester joins the team, who has no development skills. This person is supposed to test the new business features of the upcoming release.
Reaction: The tester reads the acceptance test documentation and starts to write new automated acceptance tests.
Metric: A tester without development skills can learn the acceptance test concepts in less than one day.
Background: An automated acceptance and integration testing framework helps to verify the correctness of business (or domain) functionality. These tests are written in a domain-specific language.